摘要
利用X射线衍射、扫描电镜和电子万能试验机等研究了不同退火工艺对挤压制备的Ti-4.5Al-2.2V-0.1Fe合金组织结构和力学性能的影响。结果表明:退火后,合金的X射线衍射峰略向左偏移,说明其晶格发生膨胀。制备态合金的组织以网篮组织为主,退火后获得了少量魏氏组织、双态组织和等轴组织。960℃+570℃退火后合金显微硬度达542.5 HV1;760℃退火后合金的拉伸强度与塑性匹配较优,并且其压缩塑性较好,韧窝多且深,其压缩应变值为27.4%,960℃+570℃退火后合金的压缩强度较高,达1738 MPa。总之,经760℃退火后,Ti-4.5Al-2.2V-0.1Fe合金的强度与塑性匹配较优,综合性能良好。
Effect of different annealing processes on microstructure and mechanical properties of Ti-4.5Al-2.2V-0.1Fe alloy prepared by extrusion was studied by means of X-ray diffraction,scanning electron microscopy and electronic universal testing machine.The results show that after annealing,the X-ray diffraction peak of the alloy shifts slightly to the left,indicating that its lattice expands.The microstructure of the as-prepared alloy is mainly composed of the basketweave structure,and a small amount of the Widmanstatten structure,bimodal structure and equiaxed structure are obtained after annealing.After double annealing at 960℃and 570℃,the microhardness of the alloy reaches 542.5 HV1.After annealing at 760℃,the tensile strength and plasticity of the alloy match better,and its compression plasticity is better,with many and deep dimples,and its compression strain value is 27.4%.After double annealing at 960℃and 570℃,the compressive strength of the alloy is higher,reaching 1738 MPa.In a word,after annealing at 760℃,the Ti-4.5Al-2.2V-0.1Fe alloy has better strength and plasticity matching and good comprehensive properties.
作者
王峰
王璐
傅正元
刘景顺
WANG Feng;WANG Lu;FU Zheng-yuan;LIU Jing-shun(School of Materials Science and Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2023年第3期77-85,共9页
Transactions of Materials and Heat Treatment
基金
内蒙古自治区自然科学基金杰出青年培育基金(2020JQ05)
内蒙古自治区科技计划(2020GG0267,2022YFHH0084)
内蒙古自治区“有色金属新材料及先进制造技术”高校创新团队(NMGIRT2211)
内蒙古工业大学材料学重点学科团队项目(ZD202012)
内蒙古自治区大学生创新创业训练计划(202010128017)。
