期刊论文

Effect of thermal processing on critical grain growth of extruded FGH4096 alloy

Si, J.-Y.

中文

中国有色金属学报

1004-0609

2020

30

6

1317-1328

10.11817/j.ysxb.1004.0609.2020-39523

16A220:湖南省教育厅重点项目 2017JJ2403:湖南省自然科学基金面上项目 2014207:湖南省高等学校科技创新团队支持计划 CX20192078:中南林业科技大学研究生科技创新项目

本校为第一且通讯机构

基于挤压态FGH4096合金双圆锥台试样热压缩变形及过固溶热处理试验,结合DEFORM有限元软件数值模拟,确定试样中各等效应变范围内临界晶粒长大分布规律,研究热加工工艺对挤压态FGH4096合金临界晶粒长大的影响。结果表明:在温度980~1060℃、应变速率0.003~0.03s~(-1)条件下,双圆锥台试样热变形后再经过固溶热处理,合金临界晶粒长大的窗口条件从低温低应变速率向高温高应变速率转变,其中(980℃、0.03s~(-1))、(1060℃、0.003s~(-1))条件下可以避免出现临界晶粒长大,并获得均匀晶粒组织。当变形温度为980℃时,随着应变速率的增加,异常晶粒长大程度减小,且合金临界晶粒长大位置的临界等效应变数值降低...

Based on the hot compression deformation and supersolvus heat treatment of extruded FGH4096 alloy double-cone specimens, with the DEFORM numerical simulation, the distribution of critical grain growth (CGG) in different effective strain ranges was determined. The effect of hot working process on CGG of extruded FGH4096 alloy was studied. The results show that the window conditions for the CGG of the alloy range change from low strain rate at low temperature to high strain rate at high temperature, after the double-cone specimens deformed at tem...