超细晶工业纯钛热变形流动应力特征研究  

Flow Stress of Ultrafine-Grained Commercially Pure Ti during Hot Compression Deformation

作　　者：王成[1] 赵西成[1] 杨西荣[1] 丁茹[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《稀有金属》2010年第2期298-301,共4页Chinese Journal of Rare Metals

基　　金：国家自然科学基金项目(50874086)资助;陕西省教育厅专项基金项目(07JK307)资助;西安建筑科技大学重大科技项目创新基金项目(ZX0506)资助

摘　　要：在室温下以等径弯曲通道变形(ECAP)技术制备超细晶工业纯钛,采用Gleeble-1500热模拟实验机对粗晶和超细晶工业纯钛在热变形条件下的流动应力特征进行了研究。结果表明:超细晶工业纯钛在热压缩过程中,热压缩条件不同流动应力变化规律会有所差异。在较低应变速率条件下,随变形程度的增加,流动应力增加到峰值后开始下降,呈现明显的动态再结晶特征;而在较高应变速率下,呈现稳态流变特征。此外,与粗晶工业纯钛相比,超细晶工业纯钛的屈服应力显著增强。Ultrafine-grained(UFG)commercially pure(CP)Ti was prepared by equal channel angular pressing(ECAP)at room temperature.The flow stress of coarse-grained(CG)and UFG CP-Ti during hot deformation was studied by using Gleeble-1500 simulator machine.The results showed that the flow stress of UFG CP-Ti would change significantly with the thermal compression conditions.At lower strain rates,with the increase of strain,the flow stress increased to a peak value and then fell down.The curves expressed the feature of d...

关 键 词：超细晶工业纯钛 等径弯曲通道变形 热变形 流动应力 

分 类 号：TG146.23[一般工业技术—材料科学与工程]