The military-industrial scientific research system of the academic master.

By August 2002, the WS-8 had been finalized, but the WS-10 project had not yet been officially launched, which happened to be the gap between the two major models.

For the current Aviation Power Group, the task at hand for Chang Haonan is the top priority.

Even in the entire sequence of the Science and Technology Commission, its importance ranks among the top.

So naturally, his request was quickly responded to by his superiors and sister units.

Especially No. 621.

Although Institute 621 was retained under the Aviation Industry Corporation of China when the company split up, it still organized a research and development team to rush to Gaojing in the shortest time possible.

Even earlier than the professors from the two local universities...

Chang Haonan didn't bother to do anything fancy and directly received the other party's technical staff in the project team's dedicated archive room.

Sure enough, the effect is outstanding.

When the leader saw a filing cabinet full of information, he was so shocked that he dropped the briefcase in his hand.

I stared at the door for a long time before I noticed Chang Haonan sitting not far away.

For a moment, the atmosphere around them was a little awkward——

What should I do if I leave my boss alone on the first day of reporting? Waiting online, very urgent.jpg

In the end, Chang Haonan stood up and took two steps forward half-jokingly:

"I've heard before that Researcher Hang Zhibin can forget about his wife once he looks at research materials. When we met today, I found that his reputation is indeed well-deserved..."

The few people following Hang Zhibin also cooperated very well and laughed in a good-natured manner, which finally made the scene lively again.

"Hello, Mr. Chang."

Hang Zhibin quickly shook hands with Chang Haonan, and then said:

"Originally, after hearing about your situation a few days ago, my mentor, Academician Cao Xiaochun, was going to come here in person. But because he suddenly felt unwell, I had to temporarily take over the team. I hope that President Chang can give me more guidance..."

Cao Xiaochun, a big shot in the 621 Institute who specializes in titanium alloy materials, presided over the research and development of a series of titanium-aluminum alloy materials and their processing technologies, including TC2, TC4, and TC11.

Due to this outstanding contribution, he was awarded as an academician of the Chinese Academy of Sciences in 1997.

To some extent, the reason why Chang Haonan was able to quickly apply his knowledge to the field of aviation design after his rebirth in 1996 without encountering particularly strong resistance in materials was that he benefited a lot from the scientific research dividends of Academician Cao Xiaochun.

High-temperature resistant titanium alloys that can withstand 550°C or even higher operating temperatures are currently the focus of their research.

Of course, although we say we are tackling key problems, we have actually only entered the exploratory stage.

China has indeed developed several titanium alloy materials for use in aircraft engines in the past.

But that's all for the fans and compressors, the cold end parts.

It is completely different from Rolls-Royce's direct use of turbo.

Now Chang Haonan suddenly got his hands on thousands of pieces of information, and they were all certified by Rolls-Royce.

Institute 621 naturally hopes to see it as soon as possible.

"Guidance... that's not the case at the moment."

Chang Haonan gestured to the people at the door to sit down around a small table:

"The main reason I asked you to come here this time is because I need your research and development experience in titanium alloy materials. After all, Haofa... In fact, including myself, we have never systematically studied titanium alloy materials in the past. Sometimes, relying solely on these things given by the British is not enough..."

After all, China did not directly introduce the full set of technology, so Rolls-Royce naturally could not really provide complete information -

It is already difficult to process semi-finished blanks, let alone to reverse engineer the same or equivalent high-temperature titanium alloy.

At least it's not just about following the information.

"No, no... Our research group has been paying attention to the computational materials science direction that Mr. Chang mentioned before. There are still many details that I would like to take this opportunity to verify with you..."

……

In fact, titanium alloy materials should be divided into two directions.

Some people are responsible for developing the laser processing technology, while others are responsible for researching the materials themselves.

However, in the early stages of research, what both sides need to do is exactly the same.

Make representations.

Although the information provided by the British side already included content such as micromorphology and metallographic structure, this process is still necessary once it reaches the Chinese.

Because the object of characterization is not just the semi-finished product to be processed.

There are also materials that have been processed by different processes, especially lasers of different wavelengths and pulse widths.

In terms of performance, they can only be regarded as waste products produced during the process development.

But for materials science, especially the computational materials science that Chang Haonan is studying, waste itself also has value.

Of course, Chang Haonan definitely doesn’t need to do the testing himself.

However, the construction of material spectra and related databases, as well as the interaction relationships between particles such as titanium-aluminum-chromium-niobium-oxygen, still require him to take charge.

The composition of the British titanium alloy is not that complicated.

Ti-47Al-2Cr-2Nb.

Abbreviated as 4722.

For Chang Haonan, it is considered a classic product of a generation.

So much so that when he saw the result for the first time, he was not surprised at all.

Because even in the previous life, its improved version 4822 was the world's first high-temperature resistant titanium alloy put into practical use.

It is just used by General Electric on the GEnx, which is the engine of the 787.

As for the material itself, it was developed even earlier.

It now seems that the reason why it has not been applied earlier is probably mainly because it encountered great difficulties in processing.

After all, if it weren't for him, the Trent 900 would most likely have to replace the low-pressure turbine back to nickel-based alloy.

Therefore, after the initial preparation stage, Chang Haonan was ready to overcome difficulties.

But even so, the situation that followed was still somewhat beyond his expectations——

At first, Chang Haonan's plan was to use other brands of titanium-aluminum alloys to test algorithms and processes, form a database like nickel-based alloys, and then try to process 4722 materials.

After all, the British provided a limited number of semi-finished blades.

Although the contract stipulates that normal use during the trial production process is not included in processing losses, Rolls-Royce can also provide new samples later.

But not only does international mail take time, more importantly, the terms also state that all processing waste must not be disposed of at will and must be returned to the British side.

On the surface, this doesn't seem surprising.

But it means that if the entire process development process is tested using materials provided by Rolls-Royce, then the other party may be able to infer some useful information from the waste.

However, in this kind of matter, the initiative is still on China's side.

Therefore, Chang Haonan thought of using other brands of titanium alloys that could be produced independently for preliminary tests.

It is equivalent to only giving the other party an answer in the end, and the process is a big "omission".

Anyone who has been to school should understand this kind of destructive power.

However, according to the process parameters fitted by this process, cracks appeared during the first sample test.

They're not even the kind of micro-cracks that require a microscope to see clearly.

But macro cracks...

"Mr. Chang, according to the test results, the internal shape of the hole basically meets the standards, but the appearance of the hole wall is very pessimistic."

Lu Qingsong, who was also sent from the 606th Institute, came to Chang Haonan's temporary office with a test report and a sample in his hand:

"After the probe was inserted, we could see obvious warping and defects such as burrs. Some of the cracks that spread from these defects could even penetrate the part between two adjacent air film holes..."

"Put it down first..."

The latter was also struggling with the sample photo in his hand. When he saw him coming in, he sighed with a headache and pointed to the only place on the desk that was not filled with documents:

"Also, let the trial production team pause for a moment. There are obviously some things here that we haven't noticed and have been overlooked during the calculation process."

"it is good."

Lu Qingsong nodded, but did not turn around and leave immediately.

As an engineer who participated in the development of ultra-short laser processing technology throughout the process, he also has some ideas of his own:

"Boss Chang, what should we do next? Adjust the calculation process and fitting parameters first?"

But Chang Haonan shook his head:

"The processing results this time are a bit off. It may be difficult to fix it by adjusting the process parameters alone. We need to adjust the process flow."

Having said this, he leaned back in his chair, looking a little hesitant, obviously struggling with something.

After a long while, he suddenly continued:

"We need to adjust our strategy... and work with Researcher Hang to figure out the material forming mechanism and process first!"