Anisotropic fracture toughness of a selective laser melted martensitic stainless steel

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

doi:10.1016/j.engfracmech.2023.109348

Anisotropic fracture toughness of a 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

5 Scopus citations

Abstract

Anisotropic fracture toughness of selective laser melted AISI 420 built in two build directions was investigated. Post-process heat treatments were performed at 200 °C and 400 °C to study the tempering effect. The parallel group exhibited better fracture toughness than the perpendicular group in both as-built and tempered states. K_IC value of the 400 °C tempered state was superior to that of other states due to a coarser martensite phase. Elongated cellular structure was responsible for the anisotropic behavior because of a build direction effect, while the anisotropy was barely changed by the tempering treatments.

Original language	English
Article number	109348
Journal	Engineering Fracture Mechanics
Volume	287
DOIs	https://doi.org/10.1016/j.engfracmech.2023.109348
State	Published - 14 Jul 2023

Keywords

Anisotropy
Elongated cellular structure
Fracture toughness
Selective laser melting
Tempering treatment

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10.1016/j.engfracmech.2023.109348

Development of Techniques for Laser Additive Manufacturing Mold in Metal Injection Molding (Mim) Using Fe-Based Metallic Glass Powder (Iv)
Ho, J.-R. (PI)
1/08/20 → 30/06/21
Project: Research

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title = "Anisotropic fracture toughness of a selective laser melted martensitic stainless steel",

abstract = "Anisotropic fracture toughness of selective laser melted AISI 420 built in two build directions was investigated. Post-process heat treatments were performed at 200 °C and 400 °C to study the tempering effect. The parallel group exhibited better fracture toughness than the perpendicular group in both as-built and tempered states. KIC value of the 400 °C tempered state was superior to that of other states due to a coarser martensite phase. Elongated cellular structure was responsible for the anisotropic behavior because of a build direction effect, while the anisotropy was barely changed by the tempering treatments.",

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T1 - Anisotropic fracture toughness of a selective laser melted martensitic stainless steel

AU - Jiang, Chong Ming

AU - Ho, Jeng Rong

AU - Tung, Pi Cheng

AU - Lin, Chih Kuang

PY - 2023/7/14

Y1 - 2023/7/14

N2 - Anisotropic fracture toughness of selective laser melted AISI 420 built in two build directions was investigated. Post-process heat treatments were performed at 200 °C and 400 °C to study the tempering effect. The parallel group exhibited better fracture toughness than the perpendicular group in both as-built and tempered states. KIC value of the 400 °C tempered state was superior to that of other states due to a coarser martensite phase. Elongated cellular structure was responsible for the anisotropic behavior because of a build direction effect, while the anisotropy was barely changed by the tempering treatments.

AB - Anisotropic fracture toughness of selective laser melted AISI 420 built in two build directions was investigated. Post-process heat treatments were performed at 200 °C and 400 °C to study the tempering effect. The parallel group exhibited better fracture toughness than the perpendicular group in both as-built and tempered states. KIC value of the 400 °C tempered state was superior to that of other states due to a coarser martensite phase. Elongated cellular structure was responsible for the anisotropic behavior because of a build direction effect, while the anisotropy was barely changed by the tempering treatments.

KW - Anisotropy

KW - Elongated cellular structure

KW - Fracture toughness

KW - Selective laser melting

KW - Tempering treatment

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U2 - 10.1016/j.engfracmech.2023.109348

DO - 10.1016/j.engfracmech.2023.109348

M3 - 期刊論文

AN - SCOPUS:85162232639

SN - 0013-7944

VL - 287

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

M1 - 109348

ER -

Anisotropic fracture toughness of a selective laser melted martensitic stainless steel

Abstract

Keywords

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Projects

Development of Techniques for Laser Additive Manufacturing Mold in Metal Injection Molding (Mim) Using Fe-Based Metallic Glass Powder (Iv)

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