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

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.