维普中文期刊产品整合服务

Role of the inter-pass cooling rate in recrystallization behaviors of Ni-based superalloy during interrupted hot compression

查看全文 作　　者：Xin [1]ZHANG;Hongwei [1]LI;Mei [1]ZHAN;Siliang [1,2]YAN;Ning [1]ZHANG 高影响力作者 机构地区：[1]State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University;[2]School of Material Science and Engineering, Hefei University of Technology高影响力机构 出　　处：《Chinese Journal of Aeronautics》索引2019年第32卷第5期,共17页高影响力期刊 基　　金：supports from the National Natural Science Foundation of China(U1737212and U1637102);the Research Fund of the State Key Laboratory of Solidification Processing(NWPU,China)(Grant No.149-QZ-2016);the Fundamental Research Funds for the Central Universities(3102017jc03009);The Analytical&Testing Center at Northwestern Polytechnical University is also acknowledged for the experimental support on this work 摘　　要：The microstructural evolution of a Ni-based superalloy under interrupted hot compressive deformation with different cooling rates in the inter-pass stage is investigated. It is found that metadynamic recrystallization(MDRX) in the inter-pass stage is more sensitive to the accumulated strain than the deformation temperature which is above the recrystallization temperature. The variations of both the grain distribution and the texture intensity caused by MDRX during the interpass stage result in variations of the yield stress(YS) and the work hardening(WH) rate in each stage. Results also show that the MDRX process in the inter-pass stage has a considerable influence on the final microstructure of three-pass compression. The final grain distribution is more uniform,and the compression texture gradually transforms into recrystallization texture with an increasing degree of MDRX. In order to predict the MDRX fraction in the inter-pass cooling stage, a modified kinetic equation is established, which can reasonably predict the MDRX behavior under multi-pass compression with different conditions in the inter-pass stage. Meanwhile, the influence of the interpass cooling stage on the mechanism of dynamic recrystallization(DRX) is studied. It is universally acknowledged that the discontinuous dynamic recrystallization(DDRX) process is the major deformation mechanism for the Ni-based superalloy. However, the continuous dynamic recrystallization(CDRX) process is promoted in the compression stage with a decrease of the cooling rate in each inter-pass stage. 关 键 词：Cooling rate Hot compression test Kinetic equation NI-BASED SUPERALLOY RECRYSTALLIZATION
相关文献

参考文献(39)

引证文献(6)

耦合文献(35)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费