Hetero-deformation-induced stress in additively manufactured 316L stainless steel

Decheng Kong; Chaofang Dong; Xiaoqing Ni; Zhang Liang; Cheng Man; Xiaogang Li

doi:10.1080/21663831.2020.1775149

Hetero-deformation-induced stress in additively manufactured 316L stainless steel

Decheng Kong^*
, Chaofang Dong^*
, Xiaoqing Ni
, Zhang Liang
, Cheng Man
, Xiaogang Li

^*Corresponding author for this work

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

104 Scopus citations

Abstract

Heterogeneous cellular structure combined with bimodal grain structure contributed to the high hetero-deformation-induced (HDI) stress in selective laser melted 316L stainless steel (SLMed 316L SS) and high grain boundary density at molten pool boundaries and thick cellular boundaries inside grains both acted as hard domains. However, the HDI hardening rate caused by cellular boundary was lower compared with the traditional grain boundary due to its weaker dislocation motion resistance. Under high deformation, massive deformation-induced twins penetrated the cellular boundary and distorted its configuration; therefore, grain boundary heterogeneity dominated the overall HDI stress in SLMed 316L SS after large deformation.

Original language	English
Pages (from-to)	390-397
Number of pages	8
Journal	Materials Research Letters
Volume	8
Issue number	10
DOIs	https://doi.org/10.1080/21663831.2020.1775149
State	Published - 2 Oct 2020
Externally published	Yes

Keywords

316L stainless steel
HDI stress
Selective laser melting
cellular structure

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10.1080/21663831.2020.1775149

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title = "Hetero-deformation-induced stress in additively manufactured 316L stainless steel",

abstract = "Heterogeneous cellular structure combined with bimodal grain structure contributed to the high hetero-deformation-induced (HDI) stress in selective laser melted 316L stainless steel (SLMed 316L SS) and high grain boundary density at molten pool boundaries and thick cellular boundaries inside grains both acted as hard domains. However, the HDI hardening rate caused by cellular boundary was lower compared with the traditional grain boundary due to its weaker dislocation motion resistance. Under high deformation, massive deformation-induced twins penetrated the cellular boundary and distorted its configuration; therefore, grain boundary heterogeneity dominated the overall HDI stress in SLMed 316L SS after large deformation.",

keywords = "316L stainless steel, HDI stress, Selective laser melting, cellular structure",

author = "Decheng Kong and Chaofang Dong and Xiaoqing Ni and Zhang Liang and Cheng Man and Xiaogang Li",

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doi = "10.1080/21663831.2020.1775149",

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TY - JOUR

T1 - Hetero-deformation-induced stress in additively manufactured 316L stainless steel

AU - Kong, Decheng

AU - Dong, Chaofang

AU - Ni, Xiaoqing

AU - Liang, Zhang

AU - Man, Cheng

AU - Li, Xiaogang

PY - 2020/10/2

Y1 - 2020/10/2

N2 - Heterogeneous cellular structure combined with bimodal grain structure contributed to the high hetero-deformation-induced (HDI) stress in selective laser melted 316L stainless steel (SLMed 316L SS) and high grain boundary density at molten pool boundaries and thick cellular boundaries inside grains both acted as hard domains. However, the HDI hardening rate caused by cellular boundary was lower compared with the traditional grain boundary due to its weaker dislocation motion resistance. Under high deformation, massive deformation-induced twins penetrated the cellular boundary and distorted its configuration; therefore, grain boundary heterogeneity dominated the overall HDI stress in SLMed 316L SS after large deformation.

AB - Heterogeneous cellular structure combined with bimodal grain structure contributed to the high hetero-deformation-induced (HDI) stress in selective laser melted 316L stainless steel (SLMed 316L SS) and high grain boundary density at molten pool boundaries and thick cellular boundaries inside grains both acted as hard domains. However, the HDI hardening rate caused by cellular boundary was lower compared with the traditional grain boundary due to its weaker dislocation motion resistance. Under high deformation, massive deformation-induced twins penetrated the cellular boundary and distorted its configuration; therefore, grain boundary heterogeneity dominated the overall HDI stress in SLMed 316L SS after large deformation.

KW - 316L stainless steel

KW - HDI stress

KW - Selective laser melting

KW - cellular structure

UR - https://www.scopus.com/pages/publications/85086671482

U2 - 10.1080/21663831.2020.1775149

DO - 10.1080/21663831.2020.1775149

M3 - 文章

AN - SCOPUS:85086671482

SN - 2166-3831

VL - 8

SP - 390

EP - 397

JO - Materials Research Letters

JF - Materials Research Letters

IS - 10

ER -

Hetero-deformation-induced stress in additively manufactured 316L stainless steel

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Keywords

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