Microstructural investigation of the effect of hot-isostatic-pressing treatment on a laser powder bed fused type 316L stainless steel

Songtao Zhang; Fengqin Bi; Tao Wu; Yong Wang; Zaiqing Que; Litao Chang

doi:10.1016/j.matchar.2023.112716

Microstructural investigation of the effect of hot-isostatic-pressing treatment on a laser powder bed fused type 316L stainless steel

Songtao Zhang
, Fengqin Bi
, Tao Wu
, Yong Wang^*
, Zaiqing Que^*
, Litao Chang^*

^*Corresponding author for this work

BA4509 Advanced materials for nuclear energy

Northeast Petroleum University
Shanghai Institute of Applied Physics (SINAP-CAS)

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

24 Citations (Scopus)

Abstract

Microstructure variation before and after hot isostatic pressing (HIPing) treatments of a laser powder bed fused (LPBFed) 316L stainless steel has been investigated via complementary material characterizations. The results showed that HIPing closed most of the pores in the LPBFed 316L. In addition, most of the cellular structures that formed during printing were eliminated as a result of recrystallization and grain growth. The extent of recrystallization in the LPBFed 316L increased from 68% to 96% when the HIPing temperature was increased from 1150 °C to 1180 °C (4 h for both). Cellular structures with interrupted dislocation walls were observed within the un-recrystallized grains, whilst nano-sized oxide particles existed within both the un-recrystallized and recrystallized grains. However, chemistry of the nano-sized oxides changed from Mn and Si riched to Mn and Cr riched during the HIPing process. Microstructure evolution, and especially the abnormal recrystallization behavior of the material, was discussed based on the experimental observations.

Original language	English
Article number	112716
Number of pages	8
Journal	Materials Characterization
Volume	197
DOIs	https://doi.org/10.1016/j.matchar.2023.112716
Publication status	Published - Mar 2023
MoE publication type	A1 Journal article-refereed

Funding

The authors would like to acknowledge the financial support from Shanghai Institute of Applied Physics, Chinese Academy of Sciences under grant No. E051011031, National Natural Science Foundation of China (Grant No. 51974091), VTT Substance Node Excellence Canva (GG_PIETU_Node), EU Horizon 2020 project MEACTOS (EURATOMS research and training programme 2014-2018 under grant agreement no. 755151).

UN SDGs

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

SDG 9 Industry, Innovation, and Infrastructure

Keywords

316L stainless steel
Cellular structure
Hot-isostatic press
Laser powder bed fusion
Recrystallization

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10.1016/j.matchar.2023.112716

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title = "Microstructural investigation of the effect of hot-isostatic-pressing treatment on a laser powder bed fused type 316L stainless steel",

abstract = "Microstructure variation before and after hot isostatic pressing (HIPing) treatments of a laser powder bed fused (LPBFed) 316L stainless steel has been investigated via complementary material characterizations. The results showed that HIPing closed most of the pores in the LPBFed 316L. In addition, most of the cellular structures that formed during printing were eliminated as a result of recrystallization and grain growth. The extent of recrystallization in the LPBFed 316L increased from 68\% to 96\% when the HIPing temperature was increased from 1150 °C to 1180 °C (4 h for both). Cellular structures with interrupted dislocation walls were observed within the un-recrystallized grains, whilst nano-sized oxide particles existed within both the un-recrystallized and recrystallized grains. However, chemistry of the nano-sized oxides changed from Mn and Si riched to Mn and Cr riched during the HIPing process. Microstructure evolution, and especially the abnormal recrystallization behavior of the material, was discussed based on the experimental observations.",

keywords = "316L stainless steel, Cellular structure, Hot-isostatic press, Laser powder bed fusion, Recrystallization",

author = "Songtao Zhang and Fengqin Bi and Tao Wu and Yong Wang and Zaiqing Que and Litao Chang",

note = "Funding Information: The authors would like to acknowledge the financial support from Shanghai Institute of Applied Physics, Chinese Academy of Sciences under grant No. E051011031, National Natural Science Foundation of China (Grant No. 51974091), VTT Substance Node Excellence Canva (GG\_PIETU\_Node), EU Horizon 2020 project MEACTOS (EURATOMS research and training programme 2014-2018 under grant agreement no. 755151). Publisher Copyright: {\textcopyright} 2023 Elsevier Inc.",

year = "2023",

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doi = "10.1016/j.matchar.2023.112716",

language = "English",

volume = "197",

journal = "Materials Characterization",

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T1 - Microstructural investigation of the effect of hot-isostatic-pressing treatment on a laser powder bed fused type 316L stainless steel

AU - Zhang, Songtao

AU - Bi, Fengqin

AU - Wu, Tao

AU - Wang, Yong

AU - Que, Zaiqing

AU - Chang, Litao

N1 - Funding Information: The authors would like to acknowledge the financial support from Shanghai Institute of Applied Physics, Chinese Academy of Sciences under grant No. E051011031, National Natural Science Foundation of China (Grant No. 51974091), VTT Substance Node Excellence Canva (GG_PIETU_Node), EU Horizon 2020 project MEACTOS (EURATOMS research and training programme 2014-2018 under grant agreement no. 755151). Publisher Copyright: © 2023 Elsevier Inc.

PY - 2023/3

Y1 - 2023/3

N2 - Microstructure variation before and after hot isostatic pressing (HIPing) treatments of a laser powder bed fused (LPBFed) 316L stainless steel has been investigated via complementary material characterizations. The results showed that HIPing closed most of the pores in the LPBFed 316L. In addition, most of the cellular structures that formed during printing were eliminated as a result of recrystallization and grain growth. The extent of recrystallization in the LPBFed 316L increased from 68% to 96% when the HIPing temperature was increased from 1150 °C to 1180 °C (4 h for both). Cellular structures with interrupted dislocation walls were observed within the un-recrystallized grains, whilst nano-sized oxide particles existed within both the un-recrystallized and recrystallized grains. However, chemistry of the nano-sized oxides changed from Mn and Si riched to Mn and Cr riched during the HIPing process. Microstructure evolution, and especially the abnormal recrystallization behavior of the material, was discussed based on the experimental observations.

AB - Microstructure variation before and after hot isostatic pressing (HIPing) treatments of a laser powder bed fused (LPBFed) 316L stainless steel has been investigated via complementary material characterizations. The results showed that HIPing closed most of the pores in the LPBFed 316L. In addition, most of the cellular structures that formed during printing were eliminated as a result of recrystallization and grain growth. The extent of recrystallization in the LPBFed 316L increased from 68% to 96% when the HIPing temperature was increased from 1150 °C to 1180 °C (4 h for both). Cellular structures with interrupted dislocation walls were observed within the un-recrystallized grains, whilst nano-sized oxide particles existed within both the un-recrystallized and recrystallized grains. However, chemistry of the nano-sized oxides changed from Mn and Si riched to Mn and Cr riched during the HIPing process. Microstructure evolution, and especially the abnormal recrystallization behavior of the material, was discussed based on the experimental observations.

KW - 316L stainless steel

KW - Cellular structure

KW - Hot-isostatic press

KW - Laser powder bed fusion

KW - Recrystallization

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DO - 10.1016/j.matchar.2023.112716

M3 - Article

AN - SCOPUS:85147607273

SN - 1044-5803

VL - 197

JO - Materials Characterization

JF - Materials Characterization

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ER -

Microstructural investigation of the effect of hot-isostatic-pressing treatment on a laser powder bed fused type 316L stainless steel

Abstract

Funding

UN SDGs

Keywords

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