Effect of microstructure on the fatigue crack growth behavior of laser solid formed 300M steel

Fenggang Liu; Xin Lin; Haiou Yang; Xiaoli Wen; Qiuge Li; Fencheng Liu; Weidong Huang

doi:10.1016/j.msea.2017.04.001

Effect of microstructure on the fatigue crack growth behavior of laser solid formed 300M steel

Fenggang Liu
, Xin Lin
, Haiou Yang
, Xiaoli Wen
, Qiuge Li
, Fencheng Liu
, Weidong Huang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian
Nanchang Hangkong University

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

46 Scopus citations

Abstract

In this research, the effect of microstructure on the fatigue crack growth rate (FCGR) of laser solid formed (LSFed) 300M steel was investigated. The results showed that the as-deposited microstructure of LSFed 300M steel consisted of martensite and coarse bainite. After heat treatment, the microstructure became homogeneous and was primarily composed of tempered martensite, bainite and a small amount of retained austenite. The FCGR of LSFed 300M steel gradually increases with increasing stress ratio (for a given stress intensity factor range and stress ratios between 0.1 and 0.5). The refined austenite grain of heat-treated LSFed 300M steel reduced the fatigue crack growth threshold (FCGT) and the FCGR. The fractography of as-deposited LSFed 300M steel was different from that of heat-treated LSFed 300M steel.

Original language	English
Pages (from-to)	258-264
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	695
DOIs	https://doi.org/10.1016/j.msea.2017.04.001
State	Published - 17 May 2017

Keywords

300M steel
Additive manufacturing
Fatigue crack growth behavior
Laser solid forming
Microstructure
Stress ratio

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10.1016/j.msea.2017.04.001

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title = "Effect of microstructure on the fatigue crack growth behavior of laser solid formed 300M steel",

abstract = "In this research, the effect of microstructure on the fatigue crack growth rate (FCGR) of laser solid formed (LSFed) 300M steel was investigated. The results showed that the as-deposited microstructure of LSFed 300M steel consisted of martensite and coarse bainite. After heat treatment, the microstructure became homogeneous and was primarily composed of tempered martensite, bainite and a small amount of retained austenite. The FCGR of LSFed 300M steel gradually increases with increasing stress ratio (for a given stress intensity factor range and stress ratios between 0.1 and 0.5). The refined austenite grain of heat-treated LSFed 300M steel reduced the fatigue crack growth threshold (FCGT) and the FCGR. The fractography of as-deposited LSFed 300M steel was different from that of heat-treated LSFed 300M steel.",

keywords = "300M steel, Additive manufacturing, Fatigue crack growth behavior, Laser solid forming, Microstructure, Stress ratio",

author = "Fenggang Liu and Xin Lin and Haiou Yang and Xiaoli Wen and Qiuge Li and Fencheng Liu and Weidong Huang",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = may,

day = "17",

doi = "10.1016/j.msea.2017.04.001",

language = "英语",

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TY - JOUR

T1 - Effect of microstructure on the fatigue crack growth behavior of laser solid formed 300M steel

AU - Liu, Fenggang

AU - Lin, Xin

AU - Yang, Haiou

AU - Wen, Xiaoli

AU - Li, Qiuge

AU - Liu, Fencheng

AU - Huang, Weidong

PY - 2017/5/17

Y1 - 2017/5/17

N2 - In this research, the effect of microstructure on the fatigue crack growth rate (FCGR) of laser solid formed (LSFed) 300M steel was investigated. The results showed that the as-deposited microstructure of LSFed 300M steel consisted of martensite and coarse bainite. After heat treatment, the microstructure became homogeneous and was primarily composed of tempered martensite, bainite and a small amount of retained austenite. The FCGR of LSFed 300M steel gradually increases with increasing stress ratio (for a given stress intensity factor range and stress ratios between 0.1 and 0.5). The refined austenite grain of heat-treated LSFed 300M steel reduced the fatigue crack growth threshold (FCGT) and the FCGR. The fractography of as-deposited LSFed 300M steel was different from that of heat-treated LSFed 300M steel.

AB - In this research, the effect of microstructure on the fatigue crack growth rate (FCGR) of laser solid formed (LSFed) 300M steel was investigated. The results showed that the as-deposited microstructure of LSFed 300M steel consisted of martensite and coarse bainite. After heat treatment, the microstructure became homogeneous and was primarily composed of tempered martensite, bainite and a small amount of retained austenite. The FCGR of LSFed 300M steel gradually increases with increasing stress ratio (for a given stress intensity factor range and stress ratios between 0.1 and 0.5). The refined austenite grain of heat-treated LSFed 300M steel reduced the fatigue crack growth threshold (FCGT) and the FCGR. The fractography of as-deposited LSFed 300M steel was different from that of heat-treated LSFed 300M steel.

KW - 300M steel

KW - Additive manufacturing

KW - Fatigue crack growth behavior

KW - Laser solid forming

KW - Microstructure

KW - Stress ratio

UR - https://www.scopus.com/pages/publications/85017530666

U2 - 10.1016/j.msea.2017.04.001

DO - 10.1016/j.msea.2017.04.001

M3 - 文章

AN - SCOPUS:85017530666

SN - 0921-5093

VL - 695

SP - 258

EP - 264

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Effect of microstructure on the fatigue crack growth behavior of laser solid formed 300M steel

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Keywords

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