难变形高温合金GH4976的热变形行为
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- 英文论文题名：Hot Deformation Behavior of Difficult-to-Deform of Superalloy GH4976
- 论文作者：张亚洲 ; 张勇 ; 李佩桓 ; 田世藩
- 英文论文作者：Zhang Yazhou ; Zhang Yong ; Li Peihuan ; Tian Shifan ; Science and Technology on Advanced High Temperature Structural Materials Laboratory ; Beijing Institute of Aeronautical Materials
- 年：2015
- 作者机构：北京航空材料研究院先进高温结构材料国防科技重点实验室;
- 论文关键词：GH4976合金 ; 热变形 ; 本构模型 ; 变形激活能
- 英文论文关键词：superalloy GH4976 ; hot deformation ; constitutive equation ; deformation active energy
- 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：4
- 文件大小：236k
- 原文格式：O
- 会议级别：全国
摘要
在Gleeble-3500热/力模拟试验机上对GH4976合金进行热压缩试验,变形温度1050~1125℃,变形速率0.01~10s~(-1),变形量20%,研究合金在高温热压缩过程中的流变应力变化情况。研究结果表明:在试验范围内,合金在热压缩过程中都发生了比较明显的动态再结晶;使用双曲正弦模型建立了GH4976合金的本构方程,获得合金的流变应力方程ε=1.17×10~(40)[sinh(0.6184σ)]~(6.42)exp[-1513×10~3/(RT)],其变形激活能为1513kJ/mol。
Hot deformation behavior of superalloy GH4976 was investigated on Gleeble-3500 thermal mechanical simulator at a temperature range of 1050 ~ 1125℃,and a strain rates range of 0.01 ~ 10s~(-1) with engineering of 50%.The results show that,the dynamic recrystalization occurs during the hot compression.The constitutive equation is established with the sinh model,the flow stress expression is ε = 1.17 × 10~(40)[sinh(0.6184σ)]exp[-1513 × 10~3 /(RT)],the hot deformation energy of GH4976 alloy was calculated about 1513kJ/mol。
Hot deformation behavior of superalloy GH4976 was investigated on Gleeble-3500 thermal mechanical simulator at a temperature range of 1050 ~ 1125℃,and a strain rates range of 0.01 ~ 10s~(-1) with engineering of 50%.The results show that,the dynamic recrystalization occurs during the hot compression.The constitutive equation is established with the sinh model,the flow stress expression is ε = 1.17 × 10~(40)[sinh(0.6184σ)]exp[-1513 × 10~3 /(RT)],the hot deformation energy of GH4976 alloy was calculated about 1513kJ/mol。
引文
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[2]黄福祥.涡轮盘用变形高温合金在俄国的发展[J].航空材料学报,1993,13(3):49~56.
[3]Na Y S,Yeom J T,et al.Simulation of microstnictures for Alloy 718 blade forging using 3D PEM simulator[J].Journal of Materials Processing Technology,2003,141:337~342.
[4]吴诗悖.金属超塑性变形理论[M].北京:国防工业出版社,1997,13.
[5]Mcqueen H J,Yue S,et al.Hot working characteristics of steels in austenitic state[J].J Mater Process Techno,1995,52(l/2):293~310.
[6]Shi H,Mclaren J,et al.Constitutive equations for high temperature flow stress of aluminum alloys[J].Mater Sci Technol,1997,13(3):210~216.
[7]Sellars C M,Tegart W J M.On the mechanism of hot deformation[J].Acta metallurgica,1996,14(9):1136~1138.