摘要
借助于 ＥＢＳＤ方法，研究了 ８个位向 Ｂ２结构 Ｆｅ３Ａｌ单晶室温拉伸变形时晶体取向的转动结果表明，无论原始取向如何，在拉伸过程中晶体拉伸轴总会向着（１１０）方向转动，也即（１１０）为稳定取向．当晶体拉伸轴转向取向三角形中部的软取向时，晶体表现为几何软化，相应的加工硬化率较低反之，当晶体拉伸轴转向（００１）－（１０１）对称线时，晶体表现为几何硬化，相应的加工硬化率较高．当拉伸轴处于软取向时，单晶试样的板面转向（１１１），而当拉伸轴处于硬取向时，板面转向（１１０）．晶体拉伸轴向（１１０）的转动与多晶 Ｆｅ３Ａｌ基合金｛００１｝（１１０）织构相对应；板面向（１１１）的转动与｛１１１｝织构对应；板面向（１１０）的转动则对应｛１１０｝（００１）的剪切织构．
The rotation of the tensile axis of B2-ordered Fe3Al single crystals with various orientations was investigated, whatever the tensile axis of the specimen is, it would always rotate towards orientation <110>, showing the orientation <110> to be the stable orientation for this kind of crystals. The crystals whose tensile orientations rotated to the middle part of the orientation triangle exhibit low work--hardening rate, and the plate surface orientations rotate to (111). When tensile axis rotated to the highly symmetrical orientation the crystal has very high work--hardening rate, and the plate surface orientations rotate to (110). Rotations of the tensile axis towards (110) correspond to the formation of {001}<110> fiber texture of the B2-ordered Fe3Al polycrystal; rotations of the plate surface towards (111) correspond to the {111} texture; rotations of the plate surface towards (110) correspond to the shear texture {110}<001>.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第11期1161-1164,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金!资助项目59681005
