Ti-Al基合金中的Hall-Petch关系及影响因素分析  

FACTORS AFFECTING THE Hall-Petch RELATIONSHIP IN Ti-Al BASED ALLOYS

作　　者：唐建成[1] 黄伯云[1] 贺跃辉[1] 刘文胜[1] 周科朝[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《金属学报》2002年第4期365-368,共4页Acta Metallurgica Sinica

基　　金：国家自然科学基金 59895150;国家 863高技术基金 715-005-0040资助项目~~

摘　　要：研究了全层片状组织Ｔｉ－Ａｌ基合金的室温拉伸性能与品团尺寸的关系Ｔｉ－Ａｌ基合金的室温拉伸屈服强度和断裂强度与晶团尺寸成 Ｈａｌｌ－Ｐｅｔｃｈ关系．当合金中添加替代元素 Ｃｒ和 Ｎｂ时、具 Ｈａｌｌ－Ｐｅｔｃｈ斜率下变：而添加间隙元素 Ｃ和 Ｂ时。The dependence of the room temperature tensile properties of Ti-Al based alloys with fully lamellar microstructure on colony size was studied. The tensile strength and yield strength show Hall-Petch dependences on colony size. Adding substitutional elements, Cr and Nb, leads to no apparent change in the Hall-Petch slope, but adding interstitial elements, C and 13, results in obviously increasing of the slope. The ductility does not obey a Hall-Petch dependence on colony size.

关 键 词：TI-AL基合金 拉伸性能 显微组织 HALL-PETCH关系 

分 类 号：TG146.2[一般工业技术—材料科学与工程]