应变速率对室温下90°等通道转角挤压变形工业纯钛拉伸性能的影响

机械工程材料, 2013, 37(8): 5-71.

应变速率对室温下90°等通道转角挤压变形工业纯钛拉伸性能的影响

刘晓燕 ^1, , 赵西成 ^2, , 杨西荣 ^3, , 张凯 ^4, , 解晨 ^5,

1.西安建筑科技大学冶金工程学院,西安710055

2.西安建筑科技大学冶金工程学院,西安710055

3.西安建筑科技大学冶金工程学院,西安710055

4.西安建筑科技大学冶金工程学院,西安710055

5.西安建筑科技大学冶金工程学院,西安710055

基金项目: 陕西省教育厅专项科研基金资助项目(12JK0430) 高等学校博士学科点专项科研基金资助项目(20116120110012)

关键词：等通道转角挤压(ECAP) , 工业纯钛 , 应变速率 , 拉伸性能

Effect of Strain Rate on Tensile Properties of Commercial Pure Titanium Processed by ECAP at Room Temperature with a 90° Die

LIU Xiao-yan ^1, , ZHAO Xi-cheng ^2, , YANG Xi-rong ^3, , ZHANG Kai ^4, , XIE Chen ^5,

1.西安建筑科技大学冶金工程学院,西安710055

2.西安建筑科技大学冶金工程学院,西安710055

3.西安建筑科技大学冶金工程学院,西安710055

4.西安建筑科技大学冶金工程学院,西安710055

5.西安建筑科技大学冶金工程学院,西安710055

Keywords： equal channel angular pressing (ECAP) , commercial pure titanium , strain rate , property

采用单向拉伸测试方法,研究了应变速率(0.0017,0.01,0.1 S-1)对室温下经90°等通道转角挤压变形1道次工业纯钛室温拉伸性能的影响,并分析了其断口形貌.结果表明:当应变速率由0.0017S-1升至0.1S-1时,挤压后工业纯钛的断裂伸长率由17.9％减至14.9％,抗拉强度由780 MPa增至926 MPa,应变硬化指数由0.07降低到0.04;拉伸断口均为韧窝型韧性断口,且随应变速率的增加韧窝深度变浅.

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