1.贵州大学 材料与冶金学院;2.贵州省材料结构与强度重点实验室;3.高性能金属结构材料与制造技术国家地方联合工程实验室
贵州省科技重大专项(黔科合[2014]6013)
- Sun Hao 1,2,3
- Liang Yilong 1,2,3
- Zhang Xiongfei 1,2,3
- Li Wei 1,2,3
- Yang Ming 1,2,3
1.College of Materials and Metallurgy,University of Guizhou;2.Key Laboratory for Material Structure and Strength of Guizhou Province
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将Ti–6Al–4V双相钛合金加热至α+β相区,利用墩拔方式进行大塑性热变形,然后将其置于不同的温度下进行再结晶保温热处理。结果表明：材料经形变热处理后,晶粒转变为细小的等轴α晶粒以及条状α+β组织,随再结晶温度的升高,等轴α晶粒逐渐长大,条状α+β组织也逐渐变大,发生再结晶晶粒的体积分数在增加,小角度晶界所占比例减小。800℃再结晶后延伸率和断面收缩率高达19.9%及42.5%,材料的综合力学性能则随再结晶温度的升高呈下降趋势,原因归结于晶粒的粗化及晶粒的均匀性变差所致。
The Ti–6Al–4V alloy were thermo-forged in α+β two phase region,and then recrystallized in three different temperatures. The results show that the initial microstructure were fully transformed into fine equiaxed α and lamellar α+β,the fine equiaxed α and lamellar α+βwere gradually coarsening as increasing recrystallization temperature,the relative frequency of recrystallization grain were also increased,low angle boundary shows a converse trend. The total elongation and area reduction reach up to 19.9% and 42.5%,the mechanical properties gradually decreased as the elevate temperature which were attribute to coarse and inhomogeneous grain.
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孙皓,梁益龙,张雄菲,李伟,杨明.再结晶温度对大塑性热变形Ti–6Al–4V微观组织与力学性能的影响[J].稀有金属材料与工程,2019,48(9):3015~3021.[Sun Hao, Liang Yilong, Zhang Xiongfei, Li Wei, Yang Ming. Effect of recrystallization temperature on microstructures and mechanical properties of severe plastic thermo deformation Ti–6Al–4V alloy[J]. Rare Metal Materials and Engineering,2019,48(9):3015~3021.]
DOI：10.12442/j. issn.1002-185X.20180293
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历史
- 收稿日期:2018-03-28
- 最后修改日期:2018-05-03
- 录用日期:2018-08-09
- 在线发布日期: 2019-10-09