From University Lecturer to Chief Academician

The tensile strength is 1560 MPa, what is the concept?

There are many types of titanium alloys, and the tensile strength is a very important indicator for cutting-edge titanium alloy research.

According to the index value of tensile strength, high-strength titanium alloys can be called "high-strength titanium alloys", which refers to titanium alloys with room temperature tensile strengths between 1100 MPa and 1400 MPa. And metastable β titanium alloy composition.

This is also the reason why the tensile strength of conventional titanium alloys is below 1400 MPa.

If the tensile strength value of titanium alloy is higher, it will be out of the category of 'conventional', and it will be called 'ultra-high-strength titanium alloy'.

Internationally, this type of titanium alloy is in the 'stage of development'.

Various countries and top institutions are doing research on 'ultra-high-strength titanium alloys', and some institutions and large companies have defined research indicators for ultra-high-strength titanium alloys.

For example, the Boeing Company of American, their research indicators for super strong titanium alloys are: the tensile strength at room temperature is greater than 1500 MPa, the shear strength is greater than 860 MPa, the elongation is greater than 8%, and the loading stress is equal to 45% at room temperature. The number of fatigue cycles at tensile strength is not less than 100,000 times, etc.

Under this data index, it is considered to be a metastable β titanium alloy with the serial number Ti8V5FelAl, whose typical mechanical properties reach room temperature tensile strength exceeding 1480 MPa and elongation rate of 8%.

The tensile strength of the titanium alloy produced by the metal laboratory now exceeds 1560 MPa, which is 50 MPa higher than the defined value of the ultra-high-strength titanium alloy.

Although other properties have not been tested yet, titanium alloy has a very important feature. Its tensile strength and yield strength are similar in value, and other indicators, including those, also have certain relationships.

Even if other data indicators are not ideal, it doesn’t matter much. The research project of the metal laboratory is originally a single-direction material science research. Their research purpose is to continuously improve the strength of titanium alloy, so that the research and development results can give titanium alloy Provide reference for material application research and development.

As long as the strength of the manufactured finished product increases to a certain value, the project can be said to be completed.

Previously, titanium alloys with a tensile strength of more than 1400 MPa could be used as an achievement settlement project, but the production of 1560 MPa was simply unthinkable.

Conventional means to produce titanium alloys exceeding 1500 MPa are temporarily unavailable in the world. In other words, they have achieved results exceeding the highest international level and are at the forefront of research and development of ultra-high-strength titanium alloys.

Everyone in the metal laboratory knows what the number 1560 MPa represents.

Every one of them is excited, everyone is excited.

Peng Hui was also flushed with excitement. He was excited for a while, and even danced a little. It took him a long time to calm down and began to explain his work, "Everyone pay attention, don't spread this matter!"

"Du Hai, you will continue to be in charge of testing."

"Wan Yiming, sort out all the processes and data of this manufacturing. It must be sorted out in more detail, and every small number must be recorded!"

After he finished speaking, he added, "After sorting it out, I will send a copy to Professor Wang Hao."

"good!"

The lab continued to be busy.

...

On the same day, Wang Hao received the experimental data from the metal laboratory. Because it was too late, he just glanced at the parameters of the finished product, and knowing that the expected goal was achieved, he calmly slept and rested.

On the second day, he was in the mood to take a closer look at the experiment records.

The Metal Research Institute sent two experimental records, the last time and this time, which produced titanium alloys with a tensile strength of 1410 MPa and 1560 MPa respectively.

These two experiments can be said to be very successful, and the process records and data content included are of great reference value.

Wang Hao can also be sure that his analysis is on the right path, but he still has to continue to work hard, the experimental data analysis work has not yet been completed.

The three follow-up courses last week brought another 63 points of inspiration. Up to now, the inspiration value has reached 70 points, and it is only 30 points away from reaching 100 points.

Wang Hao is still looking forward to it.

With the experience of doing data analysis for nano-micro experiments, you know that you can continue to improve the relevant analysis conclusions next time, and you can also continue to improve the strength of the finished product.

"Because it uses conventional manufacturing methods. If it can be raised to 1700 MPa, it should completely surpass the top international level."

"It is worth celebrating to be able to reach this value."

Wang Hao thought about it, he was still very busy with work, and many things were piled up at the beginning of the month.

For example, interviews with reporters.

This time a reporter came to interview, mainly because "New Advances in Mathematics" released a new issue, and his research on finding Mersenne prime numbers was published in the first article.

The publication of the paper also allowed the mathematics community to continue to discuss Mersenne prime numbers, and many mathematics circles mentioned a name - "Wang's conjecture".

The evaluation of the paper by the review editor of "New Advances in Mathematics" also mentioned the "Wang's conjecture", "This is not a perfect proof, but a conjecture that can help find Mersenne prime numbers."

"Referring to the news released by China and GIMPS, they have found several Mersenne prime numbers, including a super-large Mersenne prime number with a digit of 100 million, which is enough to prove that the 'Wang's conjecture' is true for Mersenne numbers with no more than one billion digits. .”

"What's interesting is that starting today, we have two conjectures about the research on Mersenne prime numbers..."

The other is Zhou's conjecture.

Zhou's conjecture is very famous. It is a description of the distribution of Mersenne prime numbers. Many mathematicians have carefully studied Mersenne prime numbers and tried to prove Zhou's conjecture, but they all ended in failure.

Compared with Zhou's conjecture describing the distribution, Wang's conjecture has a clear purpose, which is to find Mersenne prime numbers.

Wang's conjecture also achieved its goal.

It covers more than two-thirds of the Mersenne primes that can be computed.

Compared with Zhou's conjecture, which even ordinary people can understand, the content of Wang's conjecture is much more complicated. The two functions created are a headache to look at. Non-mathematics graduates and above, even the content of the functions Neither can understand.

The reporter came to interview Wang Hao also because "New Advances in Mathematics" published a paper.

Some time ago, the research on Mersenne prime numbers was aroused a great deal of public attention, and the reporter also wanted to know more, such as when to report the results.

Wang Hao briefly said a few words in the interview. Instead of talking about the content of the results, he made it clear that he would give a report at the Mathematical Science Center of Shuimu University after the year.

He said sincerely, "Professor Qiu Chengwen from the Center for Mathematical Sciences invited me. I thought about it carefully, and it would be easier to give a report there."

After that, Wang Hao didn't say any more.

Advances in Mathematics published his paper and had little influence on him.

Discussions in the academic circle will not affect him, and his life will not be affected in any way, because the school, including others, has long known the news.

Meanwhile, there is other good news.

Beijiang Province released the results of the annual selection of three awards for natural science, technological invention and technological progress in the province. Among them, Wang Hao's two personal research won the second prize of natural science and the first prize of technological invention in Beijiang Province.

The second prize in natural science was "Proof of Regularity of the Monge-Pey Equation" and the first prize in technological invention was "Algorithm for Multiplication of Large Numbers".

The two studies won two awards, one is the first prize and the other is the second prize. Overall, it is still very good.

Provincial awards are based on projects, and individual and team results will be put together for competition.

"The Proof of Regularity of the Monge-Pey Equation" is a world-class mathematical theoretical achievement, but in fact, the competition for awards is not high, because mathematics is not a subject that participates in the award selection, and achievements of other subjects will also compete together. Winning the second prize of natural science already shows that it is highly valued.

Of course.

If it is changed to the argument of Artin's constant to participate in the selection, it will definitely be able to easily win the first prize of natural science in the province.

It's a pity that the research on Artin's constant was completed a little late. When it was completed and submitted, the provincial science award selection had already started, so we had to wait until next year to go to the selection.

At that time, it is likely to report directly and participate in the selection of national science awards.

The science and technology awards in the two provinces are not just simple honors, but they can also get a total of 350,000 bonuses that do not need to pay taxes. It is definitely good news to get a little more bonuses.

With a happy mood, Wang Hao continued to devote himself to the data analysis work.

It's Monday at the beginning of the month.

Zhang Zhiqiang went to the finance department to get the salary slip in the morning, and he also helped Wang Hao to get it. He took the two salary slips in his hand and compared them. His good mood about paying salary was completely gone.

I saw his own salary slip, and the final actual salary was 10,465 yuan.

For Wang Hao’s one, the actual salary was 314,028 after prepaying 20% ​​of the individual tax for the school subsidy part.

Zhang Zhiqiang stared at the two salary slips and looked again and again, thinking that he and Wang Hao are both professors at Xihai University, why is there such a big gap?

Throughout the month, the salary is not even comparable to the other party's fraction.

Zhang Zhiqiang returned to the office with the salary slip, handed Wang Hao's slip over, and then looked at it with envious eyes.

Wang Hao took a glance at the salary slip, and frowned slightly, "It's 20,000 less, can't it? The paper published at the end of the month, the subsidy will be paid next month?"

He shook his head and didn't worry about it, but put the salary slip in his pocket.

Bow your head and continue to do research.

Zhang Zhiqiang returned to his seat mechanically, watching Wang Hao's movements, body, and language all the time, feeling his heart was flooded with tears.

The real salary is 310,000 yuan, and he actually said that he is not satisfied?

Say tens of thousands less?

You seem to have gotten used to that indifferent look?

Zhang Zhiqiang looked down at his salary slip again, and carefully read every number. In the end, all his emotions turned into long sighs.

Then he turned his head and looked out the window, his eyes slowly falling into a dull state.

He understood Luo Dayong a little bit.

...

at the same time.

The metal laboratory reported the results again to the Materials Science Division of the Natural Science Foundation of China.

After the material science department received the report, it thought it was a repeated report at first. After a glance, an expert immediately called the metal laboratory to confirm that it was a new development in research and development.

However, this new development is too exaggerated, and the speed is too fast!

The result reported last Monday was the manufacture of a titanium alloy with a tensile strength of 1410 MPa. Only a week later, the report stated that a titanium alloy with a tensile strength of 1560 MPa had been produced?

1410 MPa, which has already reached the standard of 'ultra-high-strength titanium alloy'. Normally, if the strength value increases by ten points, it can be regarded as a research breakthrough. A direct increase of 150 points can be described as 'incredible' .

No.

It's 'can't believe it'!

Several resident experts from the Materials Science Department gathered together and immediately decided to notify other top experts to form a review team to go to the metal laboratory to see what was going on.

The Department of Materials Science of the Natural Science Foundation of China has a team of 200 review experts for key projects, most of whom are scattered in various universities and R\u0026D institutions. The top ones include 21 academicians of the Academy of Sciences and Academy of Engineering, but most of them are In name only, it will only make a move if there are truly unjudgable and controversial results.

It's close to 'unjudgable' now.

The Department of Materials Science found Cao Dongming, one of the top domestic authoritative experts in the field of titanium alloys.

Cao Dongming is a researcher and doctoral supervisor of the Aeronautical Research Institute, and the chief technical expert of titanium alloy material technology of Aviation Group.

In the past 20 years, Cao Dongming led the team to innovate independently, completed eleven national key projects, and completed countless achievements in the application of titanium alloys. He created an aerospace titanium alloy material system that conforms to the domestic situation. He has won numerous awards, including first and second prizes for scientific and technological progress, first and second prizes for scientific and technological achievements, first and second prizes for national defense pre-research, and so on.

Cao Dongming's honors are too numerous to count, and he is considered to be the first person in the field of titanium alloy research and development in China.

When Cao Dongming heard that the metal laboratory of Xijing Jiaotong University had completed the research and development of ultra-high-strength titanium alloy, and the finished product produced by conventional means had a tensile strength as high as 1560 MPa, he was also very shocked.

At the same time, very curious.

He immediately decided to go to Xijing Jiaotong University to see what the research in the metal laboratory was like.

Cao Dongming's speed is very fast, much faster than the other experts who are coming.

At noon on Wednesday, he arrived at Xijing Jiaotong University with only one student, and went straight to the metal laboratory without saying hello in advance.

Peng Hui knew that there would be an expert group from the Materials Science Department, but he didn't expect that it would be Cao Dongming, and he came so fast, the reception was a bit rushed, so he had to take Cao Dongming to the office first.

Cao Dongming didn't care about hospitality and the like, he cared more about the research results, and immediately asked about related matters.

Peng Hui took out a shiny alloy from the box under the bookshelf, "This is the finished product. We have tested it in detail. The tensile strength at room temperature exceeds 1560 MPa."

"The yield strength is 1530 MPa, the shear strength is 1010 MPa, and the elongation is between 7.5% and 8.3%..."

He said some other data.

Cao Dongming approached and touched the surface of the alloy, "The color should be brighter, and the aluminum content is high, right? Professor Peng, can you tell me about the specific process? I heard from the Institute of Materials that the report you submitted last week, the resistance The tensile strength is 1410 MPa, is it a wrong test, or a new alloy was made."

It is also a very good achievement to produce a titanium alloy with a tensile strength of 1410 MPa by conventional means, but it does not surprise Cao Dongming so much. At most, he will only look for the manufacturing process when the research needs to increase the strength of the titanium alloy. refer to.

The titanium alloy with a tensile strength of 1560 MPa can be said to have a qualitative breakthrough in strength, and the degree of attention is completely different.

Peng Hui said, "We have improved the manufacturing process, and also controlled some processes, such as temperature adjustment during the smelting process, cooling process methods, etc., because we need to increase the temperature faster, we also used some other means..."

Cao Dongming listened to the constant nodding, and asked curiously, "How do you know, that can help increase the strength of the final product."

Peng Hui hesitated for a moment before explaining, "I have an old friend, Xia Guobin, who introduced me to Wang Hao from Xihai University. Wang Hao, you know? He is the one who is often on the news, a math genius."

"I've heard of Mersenne prime numbers." Cao Dongming nodded.

"Yes! That's him."

Peng Hui continued, "Professor Wang Hao is not only doing mathematical theoretical research, he is also a top data mining expert, helping us to analyze the experimental data and draw some conclusions. We will improve the procedures and processes according to the conclusions. "

"Professor Wang Hao has made a great contribution to the completion of this research. I also listed Wang Hao in the second place on the list of people who reported the results this time."

The second place is already the highest.

Peng Hui is the applicant and person in charge of the project, so he must be ranked first. No matter how great the contributions of other people are, they can only be ranked second.

Cao Dongming was a little puzzled when he heard this, he thought about it carefully, and said strangely, "I remember seeing Wang Hao in the investigation report on the suspension of a titanium alloy project of the Aviation Group last week. He was doing data work. , but it seems that they don't understand materials science, and they didn't find the error in reporting the experimental data, why..."

"Are you sure you're right?"

"Is it Wang Hao who got a doctorate from Donggang University and was fired by Donggang?"

On the contrary, Peng Hui laughed, and said with certainty, "It's that Wang Hao!"

"Professor Cao, you don't have to doubt it. You should have heard about Donggang's dismissal of Wang Hao when there was such a big commotion a while ago?"

Cao Dongming listened and nodded.

"Donggang University did not investigate carefully, but dismissed the faculty and staff of the school. This kind of thing can be done. The report submitted put the problem on Wang Hao. What a big deal."

"The projects of Donggang Alloy Laboratory have been interrupted, who cares about that?"

"Right."

Cao Dongming thought about this for a while, and he became more interested in Wang Hao's analysis work, "Professor Peng, can you show me the data analysis report? I want to go through the entire R\u0026D and manufacturing process. "

"Of course no problem, this way please."

After speaking, Peng Hui took the lead and walked towards the data analysis office.

(seeking a monthly ticket)