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室温90°模具ECAP变形工业纯钛的力学性能

Xi-cheng ZHAO,Chen XIE,Xi-rong YANG,Xiao-yan LIU,Hai WANG,Geng-jie WANG

Cailiao Kexue yu Gongyi/Material Science and Technology（2013）

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Abstract
采用两通道夹角Φ=90°,外圆角Ψ=20°的模具,在室温,以C方式(两次挤压道次之间试样绕纵轴旋转180°)对工业纯钛进行了4道次ECAP(Equal Channel Angular Pressing)变形,成功制得表面光滑无裂纹试样,并对其力学性能和微观组织进行了检测分析.结果表明,工业纯钛经室温4道次ECAP变形后,原始晶粒细化到170 nm左右,显微维氏硬度和抗拉强度分别由1 792 MPa、438 MPa提高到2 486 MPa、728 MPa,且保持良好的塑性,断后伸长率为21.4％.
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Key words
Commercially pure titanium,ECAP,Mechanical properties,Microstructure
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