研究了多重热处理对TC4钛合金的显微组织和力学性能的影响.多重热处理温度中第一重处理位于单相区, 第二重位于两相区,前两重热处理均采用不同的冷却速率, 最后进行时效处理. 结果表明:采用不同多重热处理制度可以调节材料的显微组织参数,包括片状α的长度、宽度、长宽比以及次生α片层的数量等,从而可以优化材料力学性能的搭配, 特别是显著提高片层组织的塑性.采用适当的多重热处理不仅提高了材料的强度和塑性, 而且使材料的断裂韧性有一定程度的提高.
The influence of multi heat-treatment on microstructure and mechanical properties of TC4 alloy is discussed in this article. The first heat-treatment of multi-treatment was executed in single phase region following air cooling or water quenching. The secondary heat-treatment was operated at different temperatures in + phase region, also following different cooling rates. Finally, the aging treatment was executed. The results show that multi heat-treatment can modulate the morphology of microstructure, including length/thickness ratio of lamella and the morphology of fine secondary . Mechanical experiments results show that certain multi heat-treatment can enhance both tensile properties and fracture toughness, the bi-lamellar microstructure can improve the resistance to crack propagation.
参考文献
| [1] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%