摘要
研究了固溶处理后预变形对Ti-6Al-4V合金时效行为和力学性能的影响。结果表明:在940和955℃固溶处理后进行预变形,可以提高时效过程中第二相α的析出。在940℃固溶处理后,随着预变形量的增加,时效处理后第二相α含量增加,α相尺寸减小,合金的强度和硬度增加。在时效处理之前进行预变形可以明显提高合金的抗拉伸强度和硬度,也能同时保持比较好的韧性。相对固溶温度为940℃,Ti-6Al-4V合金在955℃固溶处理后进行预变形对于提高合金的强度和硬度的效果不显著。采用扫描电镜对不同预变形和时效处理后的合金断口形貌进行了分析。
The effects of pre-deformation on the aging behavior and mechanical properties of Ti-6Al-4V alloy were studied.Results show that the pre-deformation after the solution process at 940 and 955℃is beneficial for promoting the precipitation of the secondaryαphase during the aging of Ti-6Al-4V alloy.When solution temperature is 940℃,the content of the secondaryαphase increases with the increase of pre-deformation amount,and the size ofαphase decreases.The strength and hardness of the alloy increase monotonously after aging.The tensile strength and hardness of Ti-6Al-4V alloy after aging with pre-deformation are evidently higher than those without pre-deformation.Simultaneously,excellent plasticity is maintained.Compared with solution treatment at 955℃with pre-deformation,the strength and hardness of Ti-6Al-4V alloy are evidently improved after solution treatment at 940℃.Scanning electron microscopy examination indicates that the fracture modes of all aged alloys with various pre-deformation degrees are ductile fracture.
作者
王书亮
付朝政
杜丽婧
李婧雪
陈雨婷
刘丽
付春艳
黄艺雄
向定汉
蒋小松
Wang Shuliang;Fu Chaozheng;Du Lijing;Li Jingxue;Chen Yuting;Liu Li;Fu Chunyan;Huang Yixiong;Xiang Dinghan;Jiang Xiaosong(Southwest Petroleum University,Chengdu 610500,China;Fujian Provincial Key Laboratory of Materials Genome,Xiamen University,Xiamen 361005,China;Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China;Guizhou Aerospace Xinli Forging&Casting Co.,Ltd,Zunyi 563003,China;Southwest Jiaotong University,Chengdu 610031,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2020年第7期2198-2206,共9页
Rare Metal Materials and Engineering
基金
Open Fund of Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology(191009-K)
Scientific Research Foundation and Opening Foundation of Southwest Petroleum University(X151518KCL23)
Open Fund of Fujian Provincial Key Laboratory of Materials Genome,Xiamen University。
