Acta Metallurgica Sinica (English Letters) ›› 1989, Vol. 2 ›› Issue (6): 418-421.
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NING Xiuzhen ZHANG Tianxiang TONG Yingjie ZHU Yaoxiao Institute of Metal Research,Academia Sinica,Shenyang,China [Originally published in ACTA METALL SIN(CHINESE EDN)25(3)1989 pp A196—A200, ZHU Yaoxiao,Professor,Institute of Metal Research,Academia Sinica,Shenyang,China