Fatigue crack growth behavior of selective laser melted martensitic stainless steel

Chong Ming Jiang; Jeng Rong Ho; Pi Cheng Tung; Chih Kuang Lin

doi:10.1016/j.ijfatigue.2023.108060

Fatigue crack growth behavior of selective laser melted martensitic stainless steel

Chong Ming Jiang, Jeng Rong Ho, Pi Cheng Tung, Chih Kuang Lin

Department of Mechanical Engineering

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

Abstract

This study investigated the fatigue crack growth (FCG) behavior of selectively laser-melted AISI 420 martensitic stainless steel built in two directions. The effect of tempering treatment at 400 °C was considered. In both as-built and tempered conditions, the parallel orientation exhibited lower fatigue crack growth rates (FCGRs) than the perpendicular orientation, indicating an anisotropic FCG behavior. Tempering treatment moderately reduced the anisotropy of FCG behavior, as the difference in FCGR between the two build orientations decreased in the tempered state. The anisotropic FCG behavior was attributed to the interaction between the crack path and the elongated cellular structure. Tempered martensite had a greater influence on the FCGR of the perpendicular group over the parallel group in tempered state.

Original language	English
Article number	108060
Journal	International Journal of Fatigue
Volume	179
DOIs	https://doi.org/10.1016/j.ijfatigue.2023.108060
State	Published - Feb 2024

Keywords

Anisotropy
Elongated cellular structure
Fatigue crack growth
Selective laser melting
Tempering treatment

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10.1016/j.ijfatigue.2023.108060

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title = "Fatigue crack growth behavior of selective laser melted martensitic stainless steel",

abstract = "This study investigated the fatigue crack growth (FCG) behavior of selectively laser-melted AISI 420 martensitic stainless steel built in two directions. The effect of tempering treatment at 400 °C was considered. In both as-built and tempered conditions, the parallel orientation exhibited lower fatigue crack growth rates (FCGRs) than the perpendicular orientation, indicating an anisotropic FCG behavior. Tempering treatment moderately reduced the anisotropy of FCG behavior, as the difference in FCGR between the two build orientations decreased in the tempered state. The anisotropic FCG behavior was attributed to the interaction between the crack path and the elongated cellular structure. Tempered martensite had a greater influence on the FCGR of the perpendicular group over the parallel group in tempered state.",

keywords = "Anisotropy, Elongated cellular structure, Fatigue crack growth, Selective laser melting, Tempering treatment",

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T1 - Fatigue crack growth behavior of selective laser melted martensitic stainless steel

AU - Jiang, Chong Ming

AU - Ho, Jeng Rong

AU - Tung, Pi Cheng

AU - Lin, Chih Kuang

PY - 2024/2

Y1 - 2024/2

N2 - This study investigated the fatigue crack growth (FCG) behavior of selectively laser-melted AISI 420 martensitic stainless steel built in two directions. The effect of tempering treatment at 400 °C was considered. In both as-built and tempered conditions, the parallel orientation exhibited lower fatigue crack growth rates (FCGRs) than the perpendicular orientation, indicating an anisotropic FCG behavior. Tempering treatment moderately reduced the anisotropy of FCG behavior, as the difference in FCGR between the two build orientations decreased in the tempered state. The anisotropic FCG behavior was attributed to the interaction between the crack path and the elongated cellular structure. Tempered martensite had a greater influence on the FCGR of the perpendicular group over the parallel group in tempered state.

AB - This study investigated the fatigue crack growth (FCG) behavior of selectively laser-melted AISI 420 martensitic stainless steel built in two directions. The effect of tempering treatment at 400 °C was considered. In both as-built and tempered conditions, the parallel orientation exhibited lower fatigue crack growth rates (FCGRs) than the perpendicular orientation, indicating an anisotropic FCG behavior. Tempering treatment moderately reduced the anisotropy of FCG behavior, as the difference in FCGR between the two build orientations decreased in the tempered state. The anisotropic FCG behavior was attributed to the interaction between the crack path and the elongated cellular structure. Tempered martensite had a greater influence on the FCGR of the perpendicular group over the parallel group in tempered state.

KW - Anisotropy

KW - Elongated cellular structure

KW - Fatigue crack growth

KW - Selective laser melting

KW - Tempering treatment

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DO - 10.1016/j.ijfatigue.2023.108060

M3 - 期刊論文

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SN - 0142-1123

VL - 179

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 108060

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Fatigue crack growth behavior of selective laser melted martensitic stainless steel

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Keywords

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