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| A Review on Deep Cryogenic Treatment of Titanium Alloy |
| JI Zhijun 1, 2, 3 , LI Guirong 4 , YE Yurong 4 , NAN Hai 1, 2, 3 , CAO Zili 4 , WANG Hongming 4 |
1. AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China;
2. Baimtec Material Co., Ltd, Beijng 100094, China;
3. Beijing Engineering Research Center of Advanced Titanium Alloy Precision Forming Technology, Beijing 100095, China;
4. Jiangsu University, Zhenjiang 212013, China |
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Abstract This paper introduces the meaning of cryogenic treatment technology and its modification effect on aluminum alloy, magnesium alloy, copper alloy and high-entropy alloy, and focuses on the research progress and modification mechanism in the deep cryogenic treated titanium alloy. It shows that cryogenic treatment has a significant modified effect on the microstructure and properties of titanium alloy. It can refine grain size, improve dislocation density, promote the formation of twin and sub-crystal structure, promote phase transformation and phase precipitation, and promote the formation of texture, and enhance the strength and toughness of titanium alloy through the mechanism of fine grain strengthening, dislocation strengthening, precipitation strengthening, texture strengthening and so on. The strength and toughness of titanium alloy can be improved synchronously by optimizing the parameters of deep cryogenic treatment. In conclusion, deep cryogenic treatment on titanium alloy is a new method and technology for solid state treatment with “high performance, high quality, low cost and low pollution” characteristic.
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2022, 
