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工业纯钛板材冷轧及退火微观组织和织构演变规律
吴佳欣1, 王莹1,2, AdrienCHAPUIS1, 何维均1, 栾佰峰1, 刘庆1
1.重庆大学 材料科学与工程学院, 重庆 400044;2.攀钢研究院, 成都 610031
摘要:
采用先进电子背散射衍射(EBSD)技术,深入研究了冷轧工艺变化和道次间退火处理对工业纯钛板材微观组织和织构演变的影响规律。通过对比不同一次冷轧变形量样品经退火和二次冷轧加工后的EBSD取向分布图、取向差角分布图和极图得知,一次冷轧产生的孪晶对退火再结晶晶粒尺寸及晶粒取向(织构)产生重要的影响,进而又影响二次冷轧的变形组织和织构特征,使二次冷轧变形孪晶的生成受到一定程度的抑制,孪晶分数随着轧制变形量的提高呈现先升高后降低的规律,同时会降低二次冷轧组织中{0001}基面织构组分。
关键词:  工业纯钛  轧制  退火  孪晶  织构
DOI:10.11835/j.issn.1000-582X.2019.08.008
分类号:TG
基金项目:国家自然科学基金项目(51505046,51421001)。
Microstructure and texture evolution of commercial pure titanium sheet during cold rolling and annealing
WU Jiaxin1, WANG Ying1,2, Adrien CHAPUIS1, HE Weijun1, LUAN Baifeng1, LIU Qing1
1.College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P. R. China;2.Panzhihua Iron and Steel Research Institute, Chengdu 610031, P. R. China
Abstract:
The effects of cold rolling process and interannealing on the microstructure and texture evolution of commercial pure titanium sheets are studied by advanced electron backscatter diffraction (EBSD) technique. Through comparing the EBSD orientation distribution, orientation difference angle distribution and pole diagram of samples with different primary cold rolling deformation after annealing and secondary cold rolling, it is known that the twins produced by first cold rolling process have an important effect on the grain size and orientation (texture) of annealed recrystallized grains, which proceeds to affect the deformation structure and texture characteristics of secondary cold rolling, and the formation of deformation twins in secondary cold rolling is restrained to a certain extent. The twin fraction increases first and then decreases with the increasement of rolling deformation. At the same time, the {0001} basal texture component in secondary cold rolling decreases.
Key words:  commercial pure titanium  rolling  annealing  twinning  texture
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