Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing

被引：12
作者：
Gu, Yanxia [1 ,2 ]
Ma, Aibin [1 ,3 ]
Jiang, Jinghua [1 ,3 ]
Yuan, Yuchun [1 ]
Li, Huiyun [1 ]
机构：
[1] Hohai Univ, Coll Mech & Mat, Nanjing 211100, Jiangsu, Peoples R China
[2] Jiangsu Maritime Inst, Nanjing 211100, Jiangsu, Peoples R China
[3] Hohai Univ, Suqian Inst, Suqian 223800, Peoples R China
来源：
METALS | 2017年 / 7卷 / 08期
关键词：
pure titanium; rotary-die equal-channel angular pressing (RD-ECAP); microstructure; mechanical properties; deformation; SEVERE PLASTIC-DEFORMATION; ROOM-TEMPERATURE; TEXTURE EVOLUTION; CP-TI; MICROSTRUCTURE;
D O I：
10.3390/met7080297
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Pure titanium was efficiently processed up to four passes at 420 degrees C by rotary-die equal-channel angular pressing (RD-ECAP). The deformation structure and mechanical properties of pure titanium with various RD-ECAP passes were subsequently investigated. Microstructure evolution revealed that plastic deformation was accommodated mainly by twins during the first and second passes, while the predominant deformation mechanism was dislocation slip during the third and fourth passes. {1012} twins were detected in the first pass, and {1011} twins occurred in the second pass of RD-ECAP. The ultimate tensile strength of pure titanium increased from 450 MPa in the as-received state to 627 MPa with a fracture elongation of 29% after four passes of RD-ECAP.
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页数：10
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