DP处理后GH4169合金在热变形过程中的组织演变
Microstructure Evolution of Delta-Processed GH4169 Alloy during Hot Deformation
摘 要
对DP处理后的GH4169合金在变形温度900~1 060 ℃、应变速率0.001~0.500 s-1下进行了热压缩变形试验，研究了变形温度、应变速率和应变量对合金显微组织、δ相形貌以及δ相演变的影响，分析了组织演变机制。结果表明：DP处理后合金的显微组织中分布有大量片层状/长针状δ相，在高温压缩变形过程中变形断裂和溶解断裂的综合作用下，随应变量的增加，δ相发生弯曲、扭折直至球化；随着变形温度的升高或应变速率的降低，δ相含量逐渐减少，合金动态再结晶晶粒尺寸和动态再结晶体积分数逐渐增大。
DP处理
δ相
热变形
动态再结晶
GH4169 alloy
delta-processed
δ phase
hot deformation
dynamic recrystallization
Abstract
The hot compressive deformation experiments were conducted on the delta-processed GH4169 alloy at the deformation temperatures of 900-1 060 ℃ and strain rates of 0.001-0.500 s-1. The effects of deformation temperature, strain rate and strain on the microstructure and the morphology and evolution of δ phase were studied and the evolution mechanism of microstructure was analyzed. The results show that a large number of plate-like or long-needle-like δ phase distributed in the microstructure of the delta-processed alloy. During the hot compressive deformation, with the increase of strain, the bending, kinking and spheroidization of the δ phase occured due to the combined effects of deformation and dissolution breakages. With the deformation temperature increasing or the strain rate decreasing, the content of δ phase decreased, while the grain size and the volume fraction of dynamic recrystallization increased.
中图分类号 TG146.1 DOI 10.11973/jxgccl201704002
所属栏目 试验研究
基金项目 国家“863”计划项目（2012AA03A514）；湖南省教育厅重点研究项目（16A220）；湖南省高校科技创新团队支持计划项目（2014207）
收稿日期 2015/12/2
修改稿日期 2017/3/6
网络出版日期
作者单位点击查看
备注司家勇(1978-),男,安徽巢湖人,副教授,博士.
引用该论文: SI Jia-yong,CHEN Long,LIAO Xiao-hang,LIU Na,ZHONG Li-ping. Microstructure Evolution of Delta-Processed GH4169 Alloy during Hot Deformation[J]. Materials for mechancial engineering, 2017, 41(4): 6～10
司家勇,陈龙,廖晓航,刘娜,钟利萍. DP处理后GH4169合金在热变形过程中的组织演变[J]. 机械工程材料, 2017, 41(4): 6～10
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参考文献
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【3】常鹏鹏,孔永华,陈国胜,等. GH4169合金的高温应力松弛行为及蠕变本构方程[J]. 机械工程材料,2015,39(5): 89-92.
【4】庄景云. 变形高温合金GH4169锻造工艺[M]. 北京:冶金工业出版社,2008.
【5】RUIZ C, OBABUEKI A, GILLESPIE K. Evaluation of the microstructure and mechanical properties of delta processed alloy 718[C]//Superalloys 1992. Warrendale, PA: TMS, 1992: 33-42.
【6】DIX A W, HYZAK J M, SINGH R P. Application of ultra fine grain alloy 718 forging billet[C]// Superalloys 1992. Warrendale, PA: TMS, 1992: 23-32.
【7】BHOWAL P R, SCHIRRA J J. Full scale GatorizingTM of fine grain Inconel 718[C]// Superalloys 718, 625, 706 and various derivatives. Warrendale, PA:TMS, 2001: 193-201.
【8】吕宏军,姚草根,张凯峰,等. GH4169合金细晶成形工艺与机理及其性能研究[J]. 机械工程材料, 2003, 27(1): 15-18.
【9】张海燕,张世宏,程明. Delta工艺中Inconel 718合金中δ相的演变机制[J]. 金属学报, 2009,45(12): 1451-1455.
【10】ZHANG H Y, ZHANG S H, CHENG M, et al. Deformation characteristics of δ phase in the delta-processed Inconel 718 alloy[J]. Materials Characterization, 2010, 61: 49-53.
【11】YUAN H, LIU W C. Effect of the delta phase on the hot deformation behavior of Inconel 718[J]. Mater Sci Eng A, 2005, 408: 281-289.
【12】WANG Y, ZHEN L, SHAO W Z, et al. Hot working characteristics and dynamic recrystallization of delta-processed superalloy 718[J]. J Alloy Compd, 2009, 44: 341-346.
【13】王岩,邵文柱,甄良. GH4169合金δ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.
【14】CONE F P. Observations on the development of delta phase in Inconel 718 alloy[C]// Superalloys 2001. Warrendale, PA:TMS, 2001: 323-332.
【15】SUNDARARAMAN M, MUKHOPADYAY P, BANERJEE S. Precipitaion and room temperature deformation behaviour of Inconel 718 [C]// Superalloys 1994. Warrendale, PA:TMS, 1994: 419-440.
【16】CAI D Y, ZHANG W H, LIU W C.Dissolution kinetics of δ phase and its influence on the notch sensitivity of Inconel 718[J]. Mater Charact,2007, 58: 220-225.
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