(1. 北京科技大學(xué) 材料科學(xué)與工程學(xué)院， 北京 100083;
2. 中國兵器工業(yè) 第五九研究所， 重慶 400083)
摘 要: 利用背散射電子衍射取向成像技術(shù)， 定量分析了具有初始織構(gòu)的AZ31鎂合金平面應(yīng)變壓縮時(shí)的孿生過程。 結(jié)果表明： 初始織構(gòu)為晶粒單胞的c軸平行于軋向時(shí)， 晶粒內(nèi)部的{101-2}孿生是主要的形變機(jī)制， 產(chǎn)生（0001）軋面的基面織構(gòu)。 隨形變量的加大及孿晶的增多， 86.3°〈112-0〉的孿晶取向關(guān)系先急劇增加， 然后明顯降低。 孿晶量與基面取向晶粒的面積百分?jǐn)?shù)對(duì)應(yīng)， 而跟孿晶關(guān)系出現(xiàn)的多少不相對(duì)應(yīng)。 測(cè)定了應(yīng)變量與孿晶量的定量關(guān)系， 并討論了可能出現(xiàn)的誤差。
關(guān)鍵字: 鎂合金； 形變； 孿晶； 織構(gòu)
（ 1. School of Materials Science and Engineering,
University of Science and Technology Beijing,
Beijing 100083, China;
2. The 59th Institute of Chinese Weapon Industry,
Chongqing 400083, China）
Abstract: The twinning process in a magnesium AZ31 alloy with initial texture is quantitatively analyzed during plane-strain compression by means of orientation mapping based on EBSD technique. The results indicate that the {101-2} twinning of c-axis tension is the main deformation mechanism if c-axes of most grains in initial sample are parallel to the rolling direction. The strong basal texture of 〈0001〉ND will be resulted. As the strain increases, the number of twin relationship of 86.3°〈112-0〉 increases to a maximum and then reduces. It is indicated that the amount of twins is proportional to the basal-oriented grains and not to the number of twin relationship detected. A quantitative relationship of strain and twin amount is given and the related errors are discussed.
Key words: magnesium alloy; deformation; twinning; texture
