Open AccessMicrostructure characteristics of Cu31.4%Mn alloyunder laser rapid solidification condition
Author(s) -
刘文今,
苏云鹏,
黄卫东,
周尧和
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.81
Subject(s) - microstructure , materials science , growth rate , laser , planar , alloy , directional solidification , range (aeronautics) , optics , composite material , geometry , physics , mathematics , computer graphics (images) , computer science
Laser rapid solidification experiments have been performed on Cu31.4%Mn alloy to investigate the response of microstructure pattern and cellular spacing selection to the variation of growth rate.With increasing growth rate,microstructures go from light band to elongated cell,regular cell,then elongated cell and planarlike structure,and finally to absolute stability planar in turn.Experimental results show that there is a distribution range in cellular spacing under the aser rapid solidification condition,the distribution range and the average spacing decrease with the increase of the growth rate.The maximum,λmax, minimum,λmin,and average primary spacing,A,as functions of growth rate vs, can be given by λmax=682v-033sλmin=289v-028s and =435v-031s,respectively.The experimental results are compared with the HuntLu numerical model for rapid cellular/dendritic growth,and a reasonable agreement is found.