Gradient in microstructure and mechanical property of selective laser melted AlSi10Mg

doi:10.1016/j.jallcom.2017.11.020

IMR OpenIR

	Gradient in microstructure and mechanical property of selective laser melted AlSi10Mg
	Liu, YJ; Liu, Z; Jiang, Y; Wang, GW; Yang, Y; Zhang, LC; Zhang, LC (reprint author), Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia.; Yang, Y (reprint author), Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Fujian, Peoples R China.
通讯作者	Yang, Y.(yy@fjirsm.ac.cn) ; Zhang, L. C.(lczhangimr@gmail.com)
	2018-02-25
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	735 页码:1414-1421
摘要	It is known that metal parts can be made stronger, tougher and better wear resistance by introducing gradient microstructure. This work reports the cooling rate of melt pool induced discrepancy in microstructural gradient and element distribution during selective laser melting (SLM), thereby resulting in decrease in microhardness and wear resistance from surface to inside with a range of similar to 100 mu m of SLMmanufactured AlSi10Mg alloy. The cooling rate in the top surface of melt pool reaches similar to 1.44 x 10(6) K/s, which is much higher than that at the bottom (<= 1 x 10(3) K/s). Such a difference in cooling rate of melt pool is the main cause for forming gradient microstructure in terms of the distribution of Si particles, dendrite size, sub-grains and sub-boundaries. The variation in microstructure of SLM-produced AlSi10Mg alloy, as a result of gradient cooling rate, has a significant impact on its mechanical properties. Compared with core area, the surface area with a higher cooling rate is composed of finer Si particles, dendritic structure and more sub-boundaries, resulting in higher microhardness and greater wear resistance. The mechanism for formation of gradient microstructure and its influence on the mechanical properties are discussed, which provide new and deep insight into fabricating SLM-produced components with gradient microstructure. (C) 2017 Elsevier B.V. All rights reserved.; It is known that metal parts can be made stronger, tougher and better wear resistance by introducing gradient microstructure. This work reports the cooling rate of melt pool induced discrepancy in microstructural gradient and element distribution during selective laser melting (SLM), thereby resulting in decrease in microhardness and wear resistance from surface to inside with a range of similar to 100 mu m of SLMmanufactured AlSi10Mg alloy. The cooling rate in the top surface of melt pool reaches similar to 1.44 x 10(6) K/s, which is much higher than that at the bottom (<= 1 x 10(3) K/s). Such a difference in cooling rate of melt pool is the main cause for forming gradient microstructure in terms of the distribution of Si particles, dendrite size, sub-grains and sub-boundaries. The variation in microstructure of SLM-produced AlSi10Mg alloy, as a result of gradient cooling rate, has a significant impact on its mechanical properties. Compared with core area, the surface area with a higher cooling rate is composed of finer Si particles, dendritic structure and more sub-boundaries, resulting in higher microhardness and greater wear resistance. The mechanism for formation of gradient microstructure and its influence on the mechanical properties are discussed, which provide new and deep insight into fabricating SLM-produced components with gradient microstructure. (C) 2017 Elsevier B.V. All rights reserved.
部门归属	[liu, y. j. ; zhang, l. c.] edith cowan univ, sch engn, 270 joondalup dr, perth, wa 6027, australia ; [liu, z. ; jiang, y. ; wang, g. w.] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [yang, y.] chinese acad sci, fujian inst res struct matter, key lab optoelect mat chem & phys, fuzhou 350002, fujian, peoples r china ; [yang, y.] peking univ, shenzhen inst, shenzhen key lab human tissue regenerat & repair, shenzhen 518057, peoples r china
关键词	Al-si Alloys Porous Structures Heat-treatment Fatigue Behavior Al-12si Alloy Ti-6al-4v Texture Composites Powder
学科领域	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	Shenzhen Fundamental Research [JCYJ 20160427170611414]; Australian Research Council [DP110101653]; ECU-PRS (International) Scholarship
DOI	10.1016/j.jallcom.2017.11.020
收录类别	SCI
语种	英语
资助项目	Shenzhen Fundamental Research[JCYJ 20160427170611414] ; Australian Research Council[DP110101653] ; ECU-PRS (International) Scholarship
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000418518600173
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：275[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79489
专题	中国科学院金属研究所
通讯作者	Zhang, LC (reprint author), Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia.; Yang, Y (reprint author), Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Fujian, Peoples R China.
推荐引用方式 GB/T 7714	Liu, YJ,Liu, Z,Jiang, Y,et al. Gradient in microstructure and mechanical property of selective laser melted AlSi10Mg[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,735:1414-1421.
APA	Liu, YJ.,Liu, Z.,Jiang, Y.,Wang, GW.,Yang, Y.,...&Yang, Y .(2018).Gradient in microstructure and mechanical property of selective laser melted AlSi10Mg.JOURNAL OF ALLOYS AND COMPOUNDS,735,1414-1421.
MLA	Liu, YJ,et al."Gradient in microstructure and mechanical property of selective laser melted AlSi10Mg".JOURNAL OF ALLOYS AND COMPOUNDS 735(2018):1414-1421.