Thermal fatigue evaluation of AISI H13 steels surface modified by gas nitriding with pre- and post-shot peening

Bin Liu, Bo Wang*, Xudong Yang, Xingfeng Zhao, Ming Qin, Jianfeng Gu

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this work, the H13 hot work die steels were surface modified and experimentally evaluated in a homemade thermal fatigue simulation tester. Two types of nitrided compound layers, and compound-free layers with and without surface deformation were prepared by a selection of surface modifications including traditional gas nitriding, controlled gas nitriding, gas nitriding with pre-shot peening, and controlled gas nitriding with post-shot peening. Thermal cracks formed in the nitrided compound layer propagated faster on surface but slower along the depth direction as compared to those in the compound-free layer. Thermal crack advancing along the depth direction in the sample nitrided with pre-shot peening had a tendency to be suppressed by the higher cross-sectional hardness distribution. The deformed compound-free nitrided layer showed the excellent thermal fatigue cracking resistance in both surface and cross-section, which was attributed to the good combination of hardness and toughness, as well as the underlying enhanced compressive residual stress.

Original languageEnglish
JournalApplied Surface Science
Volume483
Pages (from-to)45-51
ISSN0169-4332
DOIs
Publication statusPublished - 2019

Keywords

  • Gas nitriding
  • Hot work die steel
  • Shot peening
  • Thermal cracking
  • Thermal fatigue

Cite this

Liu, Bin ; Wang, Bo ; Yang, Xudong ; Zhao, Xingfeng ; Qin, Ming ; Gu, Jianfeng. / Thermal fatigue evaluation of AISI H13 steels surface modified by gas nitriding with pre- and post-shot peening. In: Applied Surface Science. 2019 ; Vol. 483. pp. 45-51.
@article{4ea17049806a4aae9c973367781734ba,
title = "Thermal fatigue evaluation of AISI H13 steels surface modified by gas nitriding with pre- and post-shot peening",
abstract = "In this work, the H13 hot work die steels were surface modified and experimentally evaluated in a homemade thermal fatigue simulation tester. Two types of nitrided compound layers, and compound-free layers with and without surface deformation were prepared by a selection of surface modifications including traditional gas nitriding, controlled gas nitriding, gas nitriding with pre-shot peening, and controlled gas nitriding with post-shot peening. Thermal cracks formed in the nitrided compound layer propagated faster on surface but slower along the depth direction as compared to those in the compound-free layer. Thermal crack advancing along the depth direction in the sample nitrided with pre-shot peening had a tendency to be suppressed by the higher cross-sectional hardness distribution. The deformed compound-free nitrided layer showed the excellent thermal fatigue cracking resistance in both surface and cross-section, which was attributed to the good combination of hardness and toughness, as well as the underlying enhanced compressive residual stress.",
keywords = "Gas nitriding, Hot work die steel, Shot peening, Thermal cracking, Thermal fatigue",
author = "Bin Liu and Bo Wang and Xudong Yang and Xingfeng Zhao and Ming Qin and Jianfeng Gu",
year = "2019",
doi = "10.1016/j.apsusc.2019.03.291",
language = "English",
volume = "483",
pages = "45--51",
journal = "Applied Surface Science",
issn = "0169-4332",
publisher = "Elsevier",

}

Thermal fatigue evaluation of AISI H13 steels surface modified by gas nitriding with pre- and post-shot peening. / Liu, Bin; Wang, Bo; Yang, Xudong; Zhao, Xingfeng; Qin, Ming; Gu, Jianfeng.

In: Applied Surface Science, Vol. 483, 2019, p. 45-51.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Thermal fatigue evaluation of AISI H13 steels surface modified by gas nitriding with pre- and post-shot peening

AU - Liu, Bin

AU - Wang, Bo

AU - Yang, Xudong

AU - Zhao, Xingfeng

AU - Qin, Ming

AU - Gu, Jianfeng

PY - 2019

Y1 - 2019

N2 - In this work, the H13 hot work die steels were surface modified and experimentally evaluated in a homemade thermal fatigue simulation tester. Two types of nitrided compound layers, and compound-free layers with and without surface deformation were prepared by a selection of surface modifications including traditional gas nitriding, controlled gas nitriding, gas nitriding with pre-shot peening, and controlled gas nitriding with post-shot peening. Thermal cracks formed in the nitrided compound layer propagated faster on surface but slower along the depth direction as compared to those in the compound-free layer. Thermal crack advancing along the depth direction in the sample nitrided with pre-shot peening had a tendency to be suppressed by the higher cross-sectional hardness distribution. The deformed compound-free nitrided layer showed the excellent thermal fatigue cracking resistance in both surface and cross-section, which was attributed to the good combination of hardness and toughness, as well as the underlying enhanced compressive residual stress.

AB - In this work, the H13 hot work die steels were surface modified and experimentally evaluated in a homemade thermal fatigue simulation tester. Two types of nitrided compound layers, and compound-free layers with and without surface deformation were prepared by a selection of surface modifications including traditional gas nitriding, controlled gas nitriding, gas nitriding with pre-shot peening, and controlled gas nitriding with post-shot peening. Thermal cracks formed in the nitrided compound layer propagated faster on surface but slower along the depth direction as compared to those in the compound-free layer. Thermal crack advancing along the depth direction in the sample nitrided with pre-shot peening had a tendency to be suppressed by the higher cross-sectional hardness distribution. The deformed compound-free nitrided layer showed the excellent thermal fatigue cracking resistance in both surface and cross-section, which was attributed to the good combination of hardness and toughness, as well as the underlying enhanced compressive residual stress.

KW - Gas nitriding

KW - Hot work die steel

KW - Shot peening

KW - Thermal cracking

KW - Thermal fatigue

U2 - 10.1016/j.apsusc.2019.03.291

DO - 10.1016/j.apsusc.2019.03.291

M3 - Journal article

VL - 483

SP - 45

EP - 51

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

ER -