evolutions of texture and grain boundary plane distributions in a ferritic stainless steel
来源期刊：中南大学学报(英文版)2012年第12期
论文作者：FANG Xiao-ying(方晓英) WANG Wei-guo(王卫国) GUO Hong(郭红) QIN Cong-xiang(秦聪祥) ZHOU Bang-xin(周邦新)
文章页码：3363 - 3368
Key words：grain texture; grain boundary plane; EBSD; ferritic stainless steel
Abstract: The grain size, textures and grain boundary plane distributions in a cold-rolled and annealed ferritic stainless steel were investigated by means of EBSD techniques. The results show that, following cold rolling with the thickness reduction of 85%, relatively low temperature (780ºC) annealing brings an extremely sluggish grain growth and no grain texture develops when the annealing time varies from 5 min to 480 min. The free energy reduction of the system is mainly caused by the grain boundary plane re-orientation in addition to minor grain growth because the distributions of grain boundary planes are moderately preferred on {100} according to the five parameter analyses (FPA) concerning the grain boundary plane characteristics. However, in the case of high-temperature (1 000 ºC) annealing, the average grain size does not increase until annealing time is prolonged to 90 min, after which extensive grain growth occurs and strong {100}áhklñ texture emerges whereas nearly random grain boundary plane distributions are observed. The free energy reduction of the system is most likely attributed to the selective growth.
FANG Xiao-ying(方晓英)1, WANG Wei-guo(王卫国)1, GUO Hong(郭红)1, QIN Cong-xiang(秦聪祥)1, ZHOU Bang-xin(周邦新)2
(1. School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China ；
2. Institute of Materials, Shanghai University, Shanghai 200072, China)
Abstract:The grain size, textures and grain boundary plane distributions in a cold-rolled and annealed ferritic stainless steel were investigated by means of EBSD techniques. The results show that, following cold rolling with the thickness reduction of 85%, relatively low temperature (780ºC) annealing brings an extremely sluggish grain growth and no grain texture develops when the annealing time varies from 5 min to 480 min. The free energy reduction of the system is mainly caused by the grain boundary plane re-orientation in addition to minor grain growth because the distributions of grain boundary planes are moderately preferred on {100} according to the five parameter analyses (FPA) concerning the grain boundary plane characteristics. However, in the case of high-temperature (1 000 ºC) annealing, the average grain size does not increase until annealing time is prolonged to 90 min, after which extensive grain growth occurs and strong {100}áhklñ texture emerges whereas nearly random grain boundary plane distributions are observed. The free energy reduction of the system is most likely attributed to the selective growth.
Key words:grain texture; grain boundary plane; EBSD; ferritic stainless steel
