图5. TD5.5%-RD5.0%-ND5.2%压缩过程中{10\bar{1}2}孪生的Schmid因子分析示意图

Fig.5. Schmid factor analyses on {10\bar{1}2} twinning system of the samples under compression path of TD5.5% (a~c), TD5.5%-RD5.0% (d~f) and TD5.5%-RD5.0%-ND5.2% (g~i)Color online(a) the angle between a-axis and the compression direction in the basal plane is 30°, the matrix (Ma, black box) and six possible twin variants (red and blue boxes)(b) the angle between a-axis and the compression direction in the basal plane is 0°, the matrix and six possible twin variants (red and blue boxes)(c) the orientations of twinning variants with the highest Schmid factors in 1st compression(d) the new twin orientations (red boxes) generated from the matrix (Md1~Md4, black boxes) in 2nd compression(e) the new twin orientations (red boxes) generated from the matrix (Md5 and Md6) in 2nd compression(f) the orientations of twinning variants with the highest Schmid factors in 2nd compression(g) the new twin orientations (red boxes) generated from the matrix (Mc1~Mc4, black boxes) in 3rd compression(h) the new twin orientations (red boxes) generated from the matrix (Mf1~Mf8, black boxes) in 3rd compression(i) the orientations of twinning variants with the highest Schmid factors in 3rd compression