摘要
目的探究TC18合金中初生α相含量对时效后次生α片层形貌及力学性能的影响。方法通过改变两相区固溶温度控制初生α相含量,观察固溶后合金元素分布及相同时效后合金的组织形貌,研究固溶温度对合金拉伸性能的影响。结果固溶过程中发生元素再分配,固溶温度低,初生α相含量高,β基体中β稳定元素含量高,β基体稳定性强,抑制时效过程中次生α片层析出,时效强化效果弱。固溶温度高,β基体稳定性弱,促进时效过程中次生α片层析出,时效强化效果显著。结论固溶温度升高,初生α相比例降低,即β基体稳定性降低,促使时效过程中大量次生α相析出,显著提高合金强度。
The effect of volume fraction of primaryαphase on alloy element partitioning,the morphology of secondaryαlamellae and the tensile property in TC18 alloy were studied.The volume fraction of primaryαphase and the morphology of secondaryαlamellae were characterized and the tensile properties were tested at different solution temperatures.The results showed that element partitioning at low solution temperature led to the inhibition ofαlamellar precipitation.On the contrary,the volume fraction of primaryαphase decreased,and the content ofβstabilizing elements inβmatrix decreased with the increase of solution temperature.This resulted in a large number of secondaryαphase precipitated during the aging process to enhanced the strength of the alloy.
作者
辛宏靖
廖敏茜
王潇汉
陈志宏
陈盅成
王平
XIN Hong-jing;LIAO Min-qian;WANG Xiao-han;CHEN Zhi-hong;CHEN Zhong-cheng;WANG Ping(Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110004,China)
出处
《精密成形工程》
北大核心
2021年第3期143-147,共5页
Journal of Netshape Forming Engineering
基金
国家自然科学基金(51690161)
东北大学“大学生创新训练计划”(200265)。
关键词
初生Α相
热处理
力学性能
元素再分配
primaryαphase
solution temperature
mechanical property
element partitioning
