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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 10    No. 1    February 2000

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Skull formation and change during ISM process of Ti-15-3alloy①
GUO Jing-jie(郭景杰), LIU Yuan(刘 源), SU Yan-qing(苏彦庆), DING Hong-sheng(丁宏升), JIA Jun(贾 均)

School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P.R.China

Abstract:The change of the skull shape and size has been predicated through computer simulation technique and compared with the experimental results. The microstructure of the skull and the elemental line distribution in the skull have been analyzed with optical microscope and EPMA etc. The results show that the skull height and thickness become small with increasing melting power; the skull consists of two zones, that is, fine equiaxial crystal zone and coarse columnar crystal zone; there exists some segregation in the bottom of the skull.

 

Key words: Ti-15-3 alloy; skull melting; microstructure segregation

ISSN 1672-7029
CN 43-1423/U

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