摘要
相变织构是各类织构中较复杂的一种,只在特殊条件下强度增加。相变织构必然是新相变体选择的结果,而EBSD技术则是有效揭示变体选择规律的手段。相变织构的有效控制可以制备出形变-再结晶工艺组合无法制备出的织构类型,从而有效提高材料的性能。本文以三种材料相变织构的EBSD分析为例,探索各种变体选择机制的差异及相互关系。分析认为,高锰TRIP钢相变织构的变体选择由取向因子及相变做功决定,纯钛相变织构的变体选择受弹性能控制,Fe-0.46Mn电工钢的相变织构由表面效应诱导下的弹性模量各向异性控制。
Transformation texture is rather complicated compared with other types of textures. Its strength enhances only in special circumstances. Transformation texture is the result of variant selection in new phase,which can be effectively revealed by EBSD technique. Transformation texture is closely related to deformation which can ＇ t be obtained by the combination of deformation and recrystallization process,thus it can enhance material properties in particular ways. This work explores the differences of variant selection and their relationship for transformation texture formation by analyzing three kinds of materials with EBSD. The analysis suggests that the variant selection in high manganese TRIP steels is controlled by orientation factors of slip systems or transformation strain,while that of pure titanium is due to the elastic strain,and finally that of Fe- 0. 46 Mn electrical steel is governed mainly by anisotropic elastic modulus by surface effect.
出处
《中国体视学与图像分析》
2016年第1期40-45,共6页
Chinese Journal of Stereology and Image Analysis
基金
国家自然科学基金(No.51271028)
关键词
相变织构
变体选择
EBSD
铁
钛
高锰钢
transformation texture
variant selection
EBSD
steel
titanium
high manganese steel
