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

^*此作品的通讯作者

University of Science and Technology Beijing
Massachusetts Institute of Technology
Shanghai Research Institute of Materials
Ocean University of China

科研成果: 期刊稿件 › 文章 › 同行评审

112 引用（Scopus）

摘要

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.

源语言	英语
页（从-至）	390-397
页数	8
期刊	Materials Research Letters
卷	8
期	10
DOI	https://doi.org/10.1080/21663831.2020.1775149
出版状态	已出版 - 2 10月 2020
已对外发布	是

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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

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DO - 10.1080/21663831.2020.1775149

M3 - 文章

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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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