Microstructural and mechanical properties of AISI 440C stainless steel fabricated using selective laser melting

Gyung Bae Bang; Young Jae Hwang; Won Rae Kim; Yeong Hwan Song; Gun Hee Kim; Soong Keun Hyun; Sung Chul Cha; Heon Joon Park; Taeg Woo Lee; Hyung Giun Kim

doi:10.1016/j.msea.2022.144259

Microstructural and mechanical properties of AISI 440C stainless steel fabricated using selective laser melting

Gyung Bae Bang
, Young Jae Hwang
, Won Rae Kim
, Yeong Hwan Song
, Gun Hee Kim
, Soong Keun Hyun
, Sung Chul Cha
, Heon Joon Park
, Taeg Woo Lee
, Hyung Giun Kim

Dept. of Civil Engineering

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

AISI 440C stainless steel (SS440C) has excellent mechanical properties. However, its industrial application is limited because SS440C cannot be fabricated into different shapes due to its high hardness and low workability. Selective laser melting (SLM) is the most suitable method to increase the workability of SS440C because the SLM process has few restrictions on manufacturing geometry. In order to observe changes in internal porosity according to process conditions, specimens under 36 different process conditions were fabricated by SLM. The changes in microstructure and defect generation mechanism in specimens fabricated under high-density process conditions were analyzed. Phase change and mechanical properties of SS440C were studied under defect free process conditions and compared with those observed by researchers in the past.

Original language	English
Article number	144259
Journal	Materials Science and Engineering: A
Volume	860
DOIs	https://doi.org/10.1016/j.msea.2022.144259
State	Published - 6 Dec 2022

Keywords

Energy density
Mechanical properties
Microstructure
Selective laser melting
Stainless steel 440C

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.msea.2022.144259

Cite this

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title = "Microstructural and mechanical properties of AISI 440C stainless steel fabricated using selective laser melting",

abstract = "AISI 440C stainless steel (SS440C) has excellent mechanical properties. However, its industrial application is limited because SS440C cannot be fabricated into different shapes due to its high hardness and low workability. Selective laser melting (SLM) is the most suitable method to increase the workability of SS440C because the SLM process has few restrictions on manufacturing geometry. In order to observe changes in internal porosity according to process conditions, specimens under 36 different process conditions were fabricated by SLM. The changes in microstructure and defect generation mechanism in specimens fabricated under high-density process conditions were analyzed. Phase change and mechanical properties of SS440C were studied under defect free process conditions and compared with those observed by researchers in the past.",

keywords = "Energy density, Mechanical properties, Microstructure, Selective laser melting, Stainless steel 440C",

author = "Bang, \{Gyung Bae\} and Hwang, \{Young Jae\} and Kim, \{Won Rae\} and Song, \{Yeong Hwan\} and Kim, \{Gun Hee\} and Hyun, \{Soong Keun\} and Cha, \{Sung Chul\} and Park, \{Heon Joon\} and Lee, \{Taeg Woo\} and Kim, \{Hyung Giun\}",

note = "Publisher Copyright: {\textcopyright} 2022 The Authors",

year = "2022",

month = dec,

day = "6",

doi = "10.1016/j.msea.2022.144259",

language = "English",

volume = "860",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

}

TY - JOUR

T1 - Microstructural and mechanical properties of AISI 440C stainless steel fabricated using selective laser melting

AU - Bang, Gyung Bae

AU - Hwang, Young Jae

AU - Kim, Won Rae

AU - Song, Yeong Hwan

AU - Kim, Gun Hee

AU - Hyun, Soong Keun

AU - Cha, Sung Chul

AU - Park, Heon Joon

AU - Lee, Taeg Woo

AU - Kim, Hyung Giun

PY - 2022/12/6

Y1 - 2022/12/6

N2 - AISI 440C stainless steel (SS440C) has excellent mechanical properties. However, its industrial application is limited because SS440C cannot be fabricated into different shapes due to its high hardness and low workability. Selective laser melting (SLM) is the most suitable method to increase the workability of SS440C because the SLM process has few restrictions on manufacturing geometry. In order to observe changes in internal porosity according to process conditions, specimens under 36 different process conditions were fabricated by SLM. The changes in microstructure and defect generation mechanism in specimens fabricated under high-density process conditions were analyzed. Phase change and mechanical properties of SS440C were studied under defect free process conditions and compared with those observed by researchers in the past.

AB - AISI 440C stainless steel (SS440C) has excellent mechanical properties. However, its industrial application is limited because SS440C cannot be fabricated into different shapes due to its high hardness and low workability. Selective laser melting (SLM) is the most suitable method to increase the workability of SS440C because the SLM process has few restrictions on manufacturing geometry. In order to observe changes in internal porosity according to process conditions, specimens under 36 different process conditions were fabricated by SLM. The changes in microstructure and defect generation mechanism in specimens fabricated under high-density process conditions were analyzed. Phase change and mechanical properties of SS440C were studied under defect free process conditions and compared with those observed by researchers in the past.

KW - Energy density

KW - Mechanical properties

KW - Microstructure

KW - Selective laser melting

KW - Stainless steel 440C

UR - https://www.scopus.com/pages/publications/85141465309

U2 - 10.1016/j.msea.2022.144259

DO - 10.1016/j.msea.2022.144259

M3 - Article

AN - SCOPUS:85141465309

SN - 0921-5093

VL - 860

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

M1 - 144259

ER -

Microstructural and mechanical properties of AISI 440C stainless steel fabricated using selective laser melting

Abstract

Keywords

UN SDGs

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