(1. 沈陽航空航天大學 材料科學與工程學院，沈陽 110036；
2. 中國科學院 金屬研究所，沈陽 110016)
摘 要: 在AZ31軋制板材上截取4種具有不同晶粒取向特征的試樣，在170℃溫熱條件下，分別對上述試樣進行壓縮變形，分析了變形過程中力學性能變化、晶粒取向演化和織構(gòu)變化，并基于壓縮過程施密特因子的分布特征，對上述變形過程中各種微觀變形模式的啟動趨勢進行了分析，最后對上述變形過程的微觀啟動模式進行了定量計算。分析結(jié)果表明：織構(gòu)明顯影響鎂合金壓縮變形過程的微觀變形機制，從而對宏觀力學性能產(chǎn)生明顯影響，平行于晶粒c軸壓縮因大量的柱面滑移系啟動而呈現(xiàn)最高應(yīng)力值。隨著晶粒c軸與壓縮方向夾角的增大，拉伸孿晶啟動量增加而導致織構(gòu)明顯改變。
關(guān)鍵字: 織構(gòu)；AZ31鎂合金；溫熱壓縮；滑移；孿晶
（1. School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110036, China;
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China）
Abstract:Four kinds of samples with different grain orientation were machined from the rolled AZ31 Mg alloy sheet, and they were compressed at warm temperature of 170 ℃, the mechanical property, grain orientation and texture evolution, micro deformation mode activation tendency were analyzed based on the Schmid factor distribution of compression, and quantitative analysis on the micro deformation modes of above deformations was carried out. The analysis results show that texture evidently affects micro deformation mechanism of Mg alloy compression, subsequently obviously affects the macro mechanical property. The compression along the c axis of grains displays the highest stress due to amounts of prismatic slips activation. The texture is obviously changed due to more extension twins activation with the angle between the compression direction and c axis of grains increased.
Key words: texture; AZ31 magnesium alloy; warm compression; slip; twin
