Band-Like Distribution of Grains in Selective Laser Melting Track Under Keyhole Mode

被引：6
|
作者：
Wang, Yafei [1 ]
Xing, Leilei [1 ]
Li, Kailun [1 ]
Yu, Chenfan [1 ]
Ma, Jing [1 ]
Liu, Wei [1 ]
Shen, Zhijian [1 ,2 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
[2] Stockholm Univ, Dept Mat & Environm Chem, Arrhenius Lab, S-10691 Stockholm, Sweden
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2019年 / 50卷 / 02期
基金：
中国国家自然科学基金;
关键词：
MOLTEN POOL; DENDRITE GROWTH; MICROSTRUCTURE; FLOW; SOLIDIFICATION; DYNAMICS;
D O I：
10.1007/s11663-018-1483-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Grain structure in the melt pool under keyhole mode is complex due to complicated solidified conditions, especially in consideration of the intense fluid flow. This paper aims to clarify grain structure and grain growth mechanism in melt pool under keyhole mode in selective laser melting. The microstructure from transverse cross section and longitudinal cross section near the centerline of 316L single tracks was characterized. In the longitudinal cross section, band-like grain structure formed. It is found that fluid flow can refine the grains, and large columnar grains grow towards crystallographic < 110 > direction.
引用
收藏
页码：1035 / 1041
页数：7
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