Materials Reports  2019, Vol. 33 Issue (z1): 326-328 |
| METALS AND METAL MATRIX COMPOSITES |
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| Effect of Aging Treatment on the Microstructure and Property of Ti12LC Titanium Alloy |
| KANG Feng, CHEN Wen, HU Chuankai, LIN Jun, XIA Xiangsheng, WU Yang
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| Southwest Technology and Engineering Research Institute, Chongqing 400039 |
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Abstract According to the heat treatment of a low-cost titanium alloy Ti12LC,this paper carried out solid solution aging process experiments, different heat treatment schemes were worked out, and the effects of aging temperature and time on the microstructure and mechanical properties of Ti12LC titanium alloy were studied. The results show that the aging temperature has a great influence on the structure and properties of the alloy. The secondary-precipitated α phase is fine acicular at low temperature aging. With the increase of temperature, the secondary-precipitated α phase begins to grow. At 600 ℃, the secondary-precipitated α phase becomes massive flaky α phase. The strength of the alloy decreases and the plasticity increases. Aging time also has a great influence on the structure and properties of the alloy. The precipitated secondary α-phase is fine acicular in a short time. With the increase of aging time, the secondary α-phase becomes short sheet or even spheroidized. The strength of the alloy increases first and then decreases, while its plasticity has the opposite trend. The optimum heat treatment process of Ti12LC titanium alloy is (840±10)℃(air)＋(560±5)℃×8h(air). With this heat treatment regime, the alloy can obtain better matching of strength and plasticity.
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Published: 05 July 2019
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| About author:: Feng Kang, obtained her M.E. degree from the Chongqing University in 2005. She has published more than 20 journal papers, applied 7 national invention patents and 4 of them were authorized. Her team’s research interests are precision forming of light alloy. |
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