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In situ TEM investigation on the precipitation behavior of mu phase in Ni-base single crystal superalloys
Gao, Shuang; Liu, Zhi-Quan; Li, Cai-Fu; Zhou, Yizhou; Jin, Tao; Liu, ZQ; Zhou, YZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
2016-05-15
发表期刊ACTA MATERIALIA
ISSN1359-6454
卷号110页码:268-275
摘要The precipitation behavior of phase in Ni-base single crystal superalloys was investigated by in situ transmission electron microscopy (TEM). A layer-by-layer growth process with a ledge propagation mechanism was first observed during in situ precipitation. Three types of mu phase with different morphologies were found, which grow along [001](mu) with (001)(mu) planar defects, [-111](mu) with (1-12)(mu) planar defects, as well as both directions with mixed planar defects. High-resolution TEM image and established atomic models reveal a basic growth mechanism of mu phase by stacking on (001)(mu) plane and randomly forming coherent planar defects, while the nucleation of incoherent (1-12)(mu) planar defects at the early stage of precipitation plays an important role in affecting the basic growth mechanism. The frequent faults during the stacking process of the sub-unit layers within mu lattice should be responsible for the defect formation. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属[gao, shuang ; liu, zhi-quan ; li, cai-fu ; zhou, yizhou ; jin, tao] chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词Ni-base Single Crystal Superalloy In Situ Tem Topologically Close-packed Phase Precipitation Behavior Planar Defects
学科领域Materials Science ; Metallurgy & Metallurgical Engineering
资助者Natural Science Foundation of China [51271186]; Hundred Talents Program of the Chinese Academy of Sciences
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75876
专题中国科学院金属研究所
通讯作者Liu, ZQ; Zhou, YZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Gao, Shuang,Liu, Zhi-Quan,Li, Cai-Fu,et al. In situ TEM investigation on the precipitation behavior of mu phase in Ni-base single crystal superalloys[J]. ACTA MATERIALIA,2016,110:268-275.
APA Gao, Shuang.,Liu, Zhi-Quan.,Li, Cai-Fu.,Zhou, Yizhou.,Jin, Tao.,...&Zhou, YZ .(2016).In situ TEM investigation on the precipitation behavior of mu phase in Ni-base single crystal superalloys.ACTA MATERIALIA,110,268-275.
MLA Gao, Shuang,et al."In situ TEM investigation on the precipitation behavior of mu phase in Ni-base single crystal superalloys".ACTA MATERIALIA 110(2016):268-275.
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