Evolution of Microstructure, Residual Stress, and Tensile Properties of Additively Manufactured Stainless Steel Under Heat Treatments

Xinchang Zhang; Michael D. McMurtrey; Liang Wang; Robert C. O’Brien; Ching Heng Shiau; Yun Wang; Randall Scott; Yang Ren; Cheng Sun

doi:10.1007/s11837-020-04433-9

Evolution of Microstructure, Residual Stress, and Tensile Properties of Additively Manufactured Stainless Steel Under Heat Treatments

Xinchang Zhang
, Michael D. McMurtrey
, Liang Wang
, Robert C. O’Brien
, Ching Heng Shiau
, Yun Wang
, Randall Scott
, Yang Ren
, Cheng Sun^*

^*Corresponding author for this work

Idaho National Laboratory
Argonne National Laboratory
Texas A&M University
University of California at Irvine

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

41 Citations (Scopus)

Abstract

This study investigated the microstructure, residual stress, and tensile properties of directed energy deposited stainless steel 316L (SS316L) under thermal annealing. Microstructure characterization shows the as-printed sample has laser-generated patterns where dendritic structure is observed at the edge of the patterns and cellular structure dominates the interior region. The thermal annealing at 983 and 1093°C effectively removes the dendritic/cellular structures. Synchrotron x-ray diffraction reveals that the as-printed SS316L exhibits compressive residual stress of − 197.4 MPa, which is greatly relieved to − 53.8 MPa after annealing at 1093°C. The room temperature tensile testing indicates that the yield strength and ultimate tensile strength drop from 378 MPa and 502 MPa in the as-printed sample to 258 MPa and 446 MPa in the annealed samples (1093°C), respectively. Our study provides insights into the relationship among microstructure, residual stress, and tensile properties of laser additive manufactured SS316L.

Original language	English
Pages (from-to)	4167-4177
Number of pages	11
Journal	JOM
Volume	72
Issue number	12
DOIs	https://doi.org/10.1007/s11837-020-04433-9
Publication status	Published - Dec 2020
Externally published	Yes

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@article{2a70cbf62ecf43ecaaa0a2c5d927b352,

title = "Evolution of Microstructure, Residual Stress, and Tensile Properties of Additively Manufactured Stainless Steel Under Heat Treatments",

abstract = "This study investigated the microstructure, residual stress, and tensile properties of directed energy deposited stainless steel 316L (SS316L) under thermal annealing. Microstructure characterization shows the as-printed sample has laser-generated patterns where dendritic structure is observed at the edge of the patterns and cellular structure dominates the interior region. The thermal annealing at 983 and 1093°C effectively removes the dendritic/cellular structures. Synchrotron x-ray diffraction reveals that the as-printed SS316L exhibits compressive residual stress of − 197.4 MPa, which is greatly relieved to − 53.8 MPa after annealing at 1093°C. The room temperature tensile testing indicates that the yield strength and ultimate tensile strength drop from 378 MPa and 502 MPa in the as-printed sample to 258 MPa and 446 MPa in the annealed samples (1093°C), respectively. Our study provides insights into the relationship among microstructure, residual stress, and tensile properties of laser additive manufactured SS316L.",

author = "Xinchang Zhang and McMurtrey, \{Michael D.\} and Liang Wang and O{\textquoteright}Brien, \{Robert C.\} and Shiau, \{Ching Heng\} and Yun Wang and Randall Scott and Yang Ren and Cheng Sun",

note = "Publisher Copyright: {\textcopyright} 2020, The Minerals, Metals \& Materials Society.",

year = "2020",

month = dec,

doi = "10.1007/s11837-020-04433-9",

language = "English",

volume = "72",

pages = "4167--4177",

journal = "JOM",

issn = "1047-4838",

publisher = "Minerals, Metals and Materials Society",

number = "12",

}

TY - JOUR

T1 - Evolution of Microstructure, Residual Stress, and Tensile Properties of Additively Manufactured Stainless Steel Under Heat Treatments

AU - Zhang, Xinchang

AU - McMurtrey, Michael D.

AU - Wang, Liang

AU - O’Brien, Robert C.

AU - Shiau, Ching Heng

AU - Wang, Yun

AU - Scott, Randall

AU - Ren, Yang

AU - Sun, Cheng

PY - 2020/12

Y1 - 2020/12

N2 - This study investigated the microstructure, residual stress, and tensile properties of directed energy deposited stainless steel 316L (SS316L) under thermal annealing. Microstructure characterization shows the as-printed sample has laser-generated patterns where dendritic structure is observed at the edge of the patterns and cellular structure dominates the interior region. The thermal annealing at 983 and 1093°C effectively removes the dendritic/cellular structures. Synchrotron x-ray diffraction reveals that the as-printed SS316L exhibits compressive residual stress of − 197.4 MPa, which is greatly relieved to − 53.8 MPa after annealing at 1093°C. The room temperature tensile testing indicates that the yield strength and ultimate tensile strength drop from 378 MPa and 502 MPa in the as-printed sample to 258 MPa and 446 MPa in the annealed samples (1093°C), respectively. Our study provides insights into the relationship among microstructure, residual stress, and tensile properties of laser additive manufactured SS316L.

AB - This study investigated the microstructure, residual stress, and tensile properties of directed energy deposited stainless steel 316L (SS316L) under thermal annealing. Microstructure characterization shows the as-printed sample has laser-generated patterns where dendritic structure is observed at the edge of the patterns and cellular structure dominates the interior region. The thermal annealing at 983 and 1093°C effectively removes the dendritic/cellular structures. Synchrotron x-ray diffraction reveals that the as-printed SS316L exhibits compressive residual stress of − 197.4 MPa, which is greatly relieved to − 53.8 MPa after annealing at 1093°C. The room temperature tensile testing indicates that the yield strength and ultimate tensile strength drop from 378 MPa and 502 MPa in the as-printed sample to 258 MPa and 446 MPa in the annealed samples (1093°C), respectively. Our study provides insights into the relationship among microstructure, residual stress, and tensile properties of laser additive manufactured SS316L.

UR - https://www.scopus.com/pages/publications/85094975988

U2 - 10.1007/s11837-020-04433-9

DO - 10.1007/s11837-020-04433-9

M3 - Article

AN - SCOPUS:85094975988

SN - 1047-4838

VL - 72

SP - 4167

EP - 4177

JO - JOM

JF - JOM

IS - 12

ER -

Evolution of Microstructure, Residual Stress, and Tensile Properties of Additively Manufactured Stainless Steel Under Heat Treatments

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