不同温度加热随后炉冷的TC4 ELI钛合金的微观组织和力学性能
Microstructure and Mechanical Property of TC4 ELI Titanium Alloy Heated at Different Temperatures then Cooled in Furnace
张明玉1
作者信息
- 1. 新疆湘润新材料科技有限公司,新疆 哈密 839000
- 折叠
摘要
对TC4 ELI钛合金在两相区温度920℃、940℃、960℃和单相区温度980℃加热2h后炉冷.随后通过金相检验、拉伸试验和断口分析检测了合金的显微组织、拉伸性能和拉伸断口形貌,以研究加热温度对TC4 ELI钛合金微观组织和力学性能的影响.结果表明:随着加热温度的提高,合金中等轴α相量减少,而次生α相的含量和尺寸增加;随着加热温度的提高,合金强度提高而塑性下降;在两相区温度加热随后炉冷的合金拉伸断口有大量韧窝,而在单相区温度加热随后炉冷的合金拉伸断口主要呈岩石状,并有明显的撕裂棱.
Abstract
TC4 ELI titanium alloy was heated at 920℃,940℃,and 960℃in two-phase region and 980℃in single-phase region for 2 h and then cooled in furnace.Subsequently,the alloy was tested for microstructure,tensile properties and morphology of tensile fracture via metallographic examination,tensile test and fracture testing,to investigate the effect of the heating temperatures on its microstructure and mechanical properties.The results showed that(a)as the heating temperature rose,the equiaxed α phase decreased,while the content and size of secondary α phase increased in the alloy;(b)with the increase in the heating temperature the alloy increased in strength and decreased in plasticity;and(c)the tensile fracture of the alloy heated at two-phase region temperatures exhibited a large number of dimples,whereas the tensile fracture of the alloy heated at single-phase region temperature was mainlyin the form of rock,and exhibited obvious tearing edges.
关键词
TC4/ELI钛合金/微观组织/拉伸性能/断口形貌Key words
TC4 ELI titanium alloy/microstructure/tensile property/fracture morphology引用本文复制引用
基金项目
自治区创新环境(人才、基地)建设专项(XJQY2009)
自治区创新环境(人才、基地)建设专项—天山创新团队计划(2020D14041)
出版年
2024
NETL
NSTL
维普
万方数据