(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: 室溫下，對AZ31鎂合金軋制板材依次沿軋向(RD)、橫向(TD)和法向(ND)壓縮，依據(jù)壓縮路徑的不同,分別對應(yīng)RD、RD-ND、RD-TD和RD-TD-ND 4種壓縮方式，分析上述壓縮過程鎂合金的力學性能和織構(gòu)變化，并對上述壓縮變形后的鎂合金分別進行室溫沿RD方向拉伸變形，分析不同壓縮變形方式對拉伸力學性能的影響。結(jié)果表明：RD-TD壓縮過程中對應(yīng)的 - 二次孿晶大幅度提高屈服強度，試樣經(jīng)RD-TD壓縮后產(chǎn)生強烈的 錐面織構(gòu)和 柱面織構(gòu)。鎂合金經(jīng)RD方向壓縮后，在后續(xù)的RD方向拉伸變形中 解孿晶的啟動明顯提高塑性。
關(guān)鍵字: 鎂合金；變路徑壓縮；織構(gòu)；拉伸孿晶；解孿晶
（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:The rolled AZ31 Magnesium alloy sheet was sequentially compressed along rolling direction (RD), transverse direction (TD) or normal direction (ND) at room temperature, the compressions RD, RD-ND, RD-TD and RD-TD-ND were correspondingly defined according to the difference of compression paths, and the mechanical property and texture evolution were analyzed for former compressions. The magnesium alloy sheets experienced the former compressions were then stretched along RD at room temperature, respectively, and the influence of compression method on the subsequent tensile mechanical properties was analyzed. The results predict that the yielding strength greatly increases during TD compression of RD-TD compression due to activations of - secondary twin, and the intensive pyramidal texture and prismatic texture form within the magnesium sheet after RD-TD compression. The plasticity of AZ31 magnesium alloy sheet stretched along RD followed by the RD compression is obviously improved due to activation of detwinning.
Key words: magnesium alloy; various path compression; texture; extension twin; detwinning
