高温合金热加工高通量测试方法及应用研究
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- 英文论文题名：High-throughput Testing Technology and Application on the Hot Working of Superalloy
- 论文作者：司家勇 ; 廖晓航 ; 谢利强 ; 刘锋
- 英文论文作者：Si Jiayong ; Liao Xiaohang ; Xie Liqiang ; Liu Feng ; College of Mechanical and Electrical Engineering ; Central South University of Forestry and Technology ; State Key Laboratory of Powder Metallurgy ; Central South University
- 年：2015
- 作者机构：中南林业科技大学机电工程学院;中南大学粉末冶金国家重点实验室;
- 论文关键词：高温合金 ; 热加工 ; 高通量测试 ; 数值模拟 ; 组织特征
- 英文论文关键词：superalloy ; hot working ; high-throughput testing technology ; simulation ; microstructure
- 会议召开时间：2015-05-20
- 会议录名称：第十三届中国高温合金年会论文集
- 英文会议录名称：Proceedings of the 13th China Superalloys Conference
- 语种：中文
- 分类号：TG132.3
- 学会代码：ZGJS
- 会议名称：第十三届中国高温合金年会
- 会议地点：中国北京
- 主办单位：中国金属学会高温材料分会
- 学会名称：中国金属学会
- 页数：5
- 文件大小：2008k
- 原文格式：O
- 会议级别：全国
摘要
本文提出高温合金热加工高通量双圆锥台试样测试方法,以DP工艺GH4169合金为研究对象,利用数值模拟方法进行了双圆锥台试样关键尺寸设计,探讨了热加工工艺参数对双圆锥台试样等效应变场分布的影响规律,进而进行了实际试验验证。实验结果表明,摩擦系数对等效应变影响显著,随着摩擦系数的提高,试样中心位置应变量增加,应变梯度加大;随着变形温度的升高和变形速率的减小,试样中心附近的等效应变数值降低,能促进δ相的溶解和断裂,加快动态再结晶的发生,增大动态再结晶晶粒尺寸。
In this paper,high throughput testing technology for the hot working of superalloy was put forward.For GH4169 alloy with delta process,key dimension of the double cone sample was designed by finite element modeling method.And the effects of hot working parameters on the effective strain were discussed.Then experiments were carried to compare with simulation.The results indicated that friction was significantly effect the effective strain.With the raising of friction,strain of specimen center and the strain gradient were higher.With increasing deformation temperature and decreasing strain rate,effective strain of center is reduced.The dissolution and breakage of 8 phase is promoted,and the volume fraction and grain size of dynamic recrystallization increase.
In this paper,high throughput testing technology for the hot working of superalloy was put forward.For GH4169 alloy with delta process,key dimension of the double cone sample was designed by finite element modeling method.And the effects of hot working parameters on the effective strain were discussed.Then experiments were carried to compare with simulation.The results indicated that friction was significantly effect the effective strain.With the raising of friction,strain of specimen center and the strain gradient were higher.With increasing deformation temperature and decreasing strain rate,effective strain of center is reduced.The dissolution and breakage of 8 phase is promoted,and the volume fraction and grain size of dynamic recrystallization increase.
引文
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[2]Semiatin S L,Weaver D S,et al.Defoxmation and recrystallization behavior during hot working of a coarsegrain,nickel-base superalloy ingot material[J].Metallurgical and Materials Transactions A,2004,35A:679~693.
[3]Eric Huron,Shesh Srivatsa,et al.Control of Grain Size Via Forging Strain Rate Limits for R'88DT[C].Superalloys 2000,TMS,Warrendale,PA,2000,49~58.
[4]郭建亭.高温合金材料学(下)——高温合金材料与工程应用[M].北京:科学出版社,2010.
[5]Zhang H Y,Zhang S H,et al.Deformation characteristics of 8 phase in the delta-processed Inconel 718 alloy[J].Materials Characterization,2010,61:49~53.
[6]王岩,邵文柱,等.GH4169合金8相的溶解行为及对变形机制的影响[J].中国有色金属学报,2011,21(2):341~349.