双重退火对TA10钛合金组织与拉伸性能的影响
Effect of Double Annealing on Microstructure and Tensile Properties of TA10 Titanium Alloy
翟欣姣 1张明玉 2岳旭 3同晓乐 3杨斌 1王玉佳1
作者信息
- 1. 新疆湘润新材料科技有限公司,新疆 哈密 839000
- 2. 大连交通大学 连续挤压教育部工程研究中心,辽宁 大连 116028
- 3. 新疆湘润新材料科技有限公司,新疆 哈密 839000;新疆钛基新材料重点实验室,新疆 哈密 839000
- 折叠
摘要
对TA10 钛合金进行了双重退火,即分别在 840℃、860℃、880℃ 和 900℃ 保温 1h空冷,随后在560℃ 保温4h空冷.退火后采用光学显微镜、扫描电子显微镜及拉伸试验机检测了合金的显微组织、拉伸性能和拉伸断口形貌.结果表明:当首次退火温度在两相区时,合金的微观组织由初生α相和β转变组织构成,且随着首次退火温度的升高,初生α相数量减少,β转变组织增多,次生α相体积明显增大;当首次退火温度在单相区时,合金中初生α相完全消失,组织以粗大β晶粒为主,晶界有明显的α相;随着首次退火温度的升高,合金的强度升高,塑性降低;当首次退火温度在两相区时,拉伸断口有大量等轴状韧窝,首次退火温度升高至单相区后,拉伸断口呈岩石状,并有明显的撕裂棱.
Abstract
TA10 titanium alloy was double annealed,that is,it was heated at 840,860,880 and 900℃ for 1 h,respectively,air cooled,and then was heated at 560℃ for 4 h and air cooled.After this,the alloy was tested for microstructure,tensile properties and pattern of tensile fracture via optical microscope,scanning electron microscope and tensile testing machine.The results showed that(a)when the first annealing temperature of the double annealing was in two-phase region,the microstructure of the alloy was composed of primary α phase and β-transformed structure,with the increase in the first annealing temperature,amount of the primary α phase decreased,amount of the β-transformed structure increased,and volume of the secondary α phase increased significantly;(b)when the first annealing temperature was in single-phase region,the primary α phase in the alloy disappeared completely,the structure was mainly composed of coarse β grains,and there were obvious α phases at grain boundary;(c)with the increase in the first annealing temperature,the alloy increased in strength and decreased in plasticity;and(d)the tensile fracture exhibited a large number of equiaxed dimples when the first annealing temperature was in the two-phase region,and was rock-like and exhibited obvious tearing edges when the first annealing temperature was increased to the single-please region.
关键词
TA10钛合金/微观组织/拉伸性能/断口Key words
Tt110 titanium alloy/microstructure/tensile property/fracture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—天山创新团队计划项目(2020D14041)
出版年
2024
NETL
NSTL
万方数据