Three-dimensional α-Mg dendritic morphology and branching structure transition in Mg-Zn alloys

被引：28

作者：

Shuai, Sansan ^{[1
]}

Guo, Enyu ^{[1
]}

Zheng, Qiwei ^{[1
]}

Wang, Mingyue ^{[2
]}

Jing, Tao ^{[1
]}

Fu, Yanan ^{[3
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat Proc Technol, Minist Educ, Beijing 100084, Peoples R China

[2] Beihang Univ, Int Res Inst Multidisciplinary Sci, Beijing 100191, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2016年 / 118卷

基金：

美国国家科学基金会;

关键词：

Magnesium alloy; X-ray tomography; Solidification; Dendritic growth; Morphology transition; PHASE-FIELD SIMULATIONS; ORIENTATION SELECTION; GROWTH; SOLIDIFICATION; TOMOGRAPHY; MAGNESIUM; EVOLUTION;

D O I：

10.1016/j.matchar.2016.06.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three-dimensional dendritic morphology and branching structure of hexagonal close-packed alpha-Mg in magnesium-zinc alloys possessing different zinc concentrations were studied using synchrotron X-ray microtomography. Interestingly, dendrite growth patterns were observed to undergo a morphologic transition with increasing zinc addition. Dendrite arms in the basal plane of hexagonal close-packed alpha-Mg tend to split and deviate from the basal plane continuously and symmetrically as a function of zinc concentrations. A hyperbranched dendrite structure was also found with an interim zinc concentration. Several types of dendrite growth patterns with different morphologies and branching structure were proposed in order to reflect the evolution of alpha-Mg dendrites with various zinc contents. (C) 2016 Elsevier Inc. All rights reserved.

引用

页码：304 / 308

页数：5

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