Effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel

In this paper, selective laser melting (SLM) was used to manufacture corrax stainless steel samples under different parameters. It was found that the SLMed samples were mainly composed by lots of fine martensite (including cellular structure, cellular dendritic grains and blocky grains), and trace a...

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Autores principales:	Ruirui Fang, Nana Deng, Hongbin Zhang, Gang Wang, Yukuo Su, Haiping Zhou, Kuidong Gao, Lianwang Gu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Selective laser melting Corrax stainless steel Mechanical properties Fracture surface Strengthening mechanism Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/00ade84b72a84e709282b017d791571e
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spelling	oai:doaj.org-article:00ade84b72a84e709282b017d791571e2021-11-24T04:26:52ZEffect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel0264-127510.1016/j.matdes.2021.110265https://doaj.org/article/00ade84b72a84e709282b017d791571e2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0264127521008200https://doaj.org/toc/0264-1275In this paper, selective laser melting (SLM) was used to manufacture corrax stainless steel samples under different parameters. It was found that the SLMed samples were mainly composed by lots of fine martensite (including cellular structure, cellular dendritic grains and blocky grains), and trace austenite. During SLM forming process, a large number of low-angle grain boundaries (LAGBs) and high-density dislocations were formed in the matrix. Meanwhile, the samples showed weak texture and no obvious preference orientation. Moreover, the relative density of all SLMed samples reached above 90%, and the relative density was above 97% when the laser energy density was 54.13–78.19 J·mm−3. Under the optimal process parameters of P = 190 W, V = 1.1 m·s−1, the relative density of sample reached above 99.52 ± 0.09%, while the sample exhibited the best mechanical properties, including the highest microhardness (374.2 ± 6.5HV), yield strength (YS = 946 ± 7.3 MPa), ultimate tensile strength (UTS = 1084 ± 3 MPa) and elongation (EL = 17.64 ± 0.18%). Moreover, the strengthening mechanisms of SLMed samples mainly included grain boundary strengthening, dislocation strengthening and precipitation strengthening, while dislocation strengthening played a dominant role. Besides that, the fracture mechanisms of SLMed samples belonged to ductile fracture, except for the samples prepared with laser energy density below 54.13 J·mm−3.Ruirui FangNana DengHongbin ZhangGang WangYukuo SuHaiping ZhouKuidong GaoLianwang GuElsevierarticleSelective laser meltingCorrax stainless steelMechanical propertiesFracture surfaceStrengthening mechanismMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110265- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Selective laser melting Corrax stainless steel Mechanical properties Fracture surface Strengthening mechanism Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Selective laser melting Corrax stainless steel Mechanical properties Fracture surface Strengthening mechanism Materials of engineering and construction. Mechanics of materials TA401-492 Ruirui Fang Nana Deng Hongbin Zhang Gang Wang Yukuo Su Haiping Zhou Kuidong Gao Lianwang Gu Effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel
description	In this paper, selective laser melting (SLM) was used to manufacture corrax stainless steel samples under different parameters. It was found that the SLMed samples were mainly composed by lots of fine martensite (including cellular structure, cellular dendritic grains and blocky grains), and trace austenite. During SLM forming process, a large number of low-angle grain boundaries (LAGBs) and high-density dislocations were formed in the matrix. Meanwhile, the samples showed weak texture and no obvious preference orientation. Moreover, the relative density of all SLMed samples reached above 90%, and the relative density was above 97% when the laser energy density was 54.13–78.19 J·mm−3. Under the optimal process parameters of P = 190 W, V = 1.1 m·s−1, the relative density of sample reached above 99.52 ± 0.09%, while the sample exhibited the best mechanical properties, including the highest microhardness (374.2 ± 6.5HV), yield strength (YS = 946 ± 7.3 MPa), ultimate tensile strength (UTS = 1084 ± 3 MPa) and elongation (EL = 17.64 ± 0.18%). Moreover, the strengthening mechanisms of SLMed samples mainly included grain boundary strengthening, dislocation strengthening and precipitation strengthening, while dislocation strengthening played a dominant role. Besides that, the fracture mechanisms of SLMed samples belonged to ductile fracture, except for the samples prepared with laser energy density below 54.13 J·mm−3.
format	article
author	Ruirui Fang Nana Deng Hongbin Zhang Gang Wang Yukuo Su Haiping Zhou Kuidong Gao Lianwang Gu
author_facet	Ruirui Fang Nana Deng Hongbin Zhang Gang Wang Yukuo Su Haiping Zhou Kuidong Gao Lianwang Gu
author_sort	Ruirui Fang
title	Effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel
title_short	Effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel
title_full	Effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel
title_fullStr	Effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel
title_full_unstemmed	Effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel
title_sort	effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/00ade84b72a84e709282b017d791571e
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_version_	1718415955421298688

Effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel

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