Effect of shot peening on microstructure,nanocrystallization and microhardness of Ti-10V-2Fe-3Al alloy surface  

作　　者：Hai-zhong Zheng Sheng-hua Guo Qin-hao Luo Xiao-yong Shu Gui-fa Li 

机构地区：[1]National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology,Nanchang Hangkong University,Nanchang 330063,Jiangxi,China

出　　处：《Journal of Iron and Steel Research International》2019年第1期52-58,共7页

基　　金：the National Natural Science Foundation of China(Grant No.51361026);the Natural Science Foundation of Jiangxi Province(Grant No.20171BAB206006);the Key Project of Science and Technology Project of Jiangxi Provincial Education Department(Grant No.GJJ160678);Open Foundation of National Defense Key Discipline Laboratory of Light Alloy Processing Science and Technology,Nanchang Hangkong University(GF201501004).

摘　　要：Severe plastic deformation of Ti-10V-2Fe-3Al alloy in the surface region was caused by shot peening at air pressure of 0.6 MPa with processing time ranging from 1 to 45 min.The results showed that the thickness of surface deformation layer was proportio nal to the processing time,the microhardness of the shot-peened surface in creased from 280 to 385 HV,and the depth of highly hardening layers arrived at 200μm.It was worth noting that a grain size gradient from nanocrystalline on the surface toward coarse grain in the matrix was obtained during the shot peening process and the minimum grain size in the top surface after shot peening was about 100-200 nm.

关 键 词：TI-10V-2FE-3AL ALLOY Shot PEENING treatment SURFACE NANOCRYSTALLIZATION Martensitic transformation MICROHARDNESS 

分 类 号：TF[冶金工程]