Effect of residual stress on thermal fatigue in a type 420 martensitic stainless steel weldment

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

This paper aimed at the investigation of the effect of residual stress on thermal fatigue in martensitic stainless steel. In this study, a submerged arc welding was utilized. In order to obtain the different magnitude of residual stresses, the parallel heat welding, vibration stress relief, shot peening, and controlled low temperature stress relief processes were used for reduction of residual stresses due to welding. During welding, the thermal cycle of different locations in weldment were recorded. The residual stresses were determined by using the hole-drilling strain-gage method of ASTM standard E837. The retained ferrite content was determined with a digital optical microscope and image process software. The experimental results showed that the residual stresses decrease with increase of thermal fatigue cycle number. This is because that the formation of crack relieves residual stresses of specimen. Because of solidification structure difference, at low thermal fatigue cycle, the density of cracks on near fusion line is the higher than centerline. At high thermal fatigue cycle, the density of crack from near fusion line is lower than centerline, but very longer crack is found easily. The retained ferrite content and thermal fatigue crack tendency exist a critical value. The retained ferrite less than about 31.5vol.% will increase crack propagation tendency. The retained ferrite become a harmful factor for crack propagation tendency when the retained ferrite more than this critical content. It is because that too much ferrite content in martensitic matrix may result in a lower strength structure and crack can propagate easily. In addition, the dual phase structure may introduce more harmful interior stress due to different volume shrinkage between retained phase and matrix.

Original languageEnglish
Pages (from-to)22-27
Number of pages6
JournalJournal of Materials Processing Technology
Volume138
Issue number1-3
DOIs
Publication statusPublished - 2003 Jul 20

Fingerprint

Martensitic stainless steel
Thermal fatigue
Ferrite
Residual stresses
Cracks
Stress relief
Welding
Crack propagation
Fusion reactions
Submerged arc welding
Shot peening
Phase structure
Strain gages
Solidification
Drilling
Microscopes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

Cite this

@article{d26ef470cd2e42ebbc90ac9a8b312a54,
title = "Effect of residual stress on thermal fatigue in a type 420 martensitic stainless steel weldment",
abstract = "This paper aimed at the investigation of the effect of residual stress on thermal fatigue in martensitic stainless steel. In this study, a submerged arc welding was utilized. In order to obtain the different magnitude of residual stresses, the parallel heat welding, vibration stress relief, shot peening, and controlled low temperature stress relief processes were used for reduction of residual stresses due to welding. During welding, the thermal cycle of different locations in weldment were recorded. The residual stresses were determined by using the hole-drilling strain-gage method of ASTM standard E837. The retained ferrite content was determined with a digital optical microscope and image process software. The experimental results showed that the residual stresses decrease with increase of thermal fatigue cycle number. This is because that the formation of crack relieves residual stresses of specimen. Because of solidification structure difference, at low thermal fatigue cycle, the density of cracks on near fusion line is the higher than centerline. At high thermal fatigue cycle, the density of crack from near fusion line is lower than centerline, but very longer crack is found easily. The retained ferrite content and thermal fatigue crack tendency exist a critical value. The retained ferrite less than about 31.5vol.{\%} will increase crack propagation tendency. The retained ferrite become a harmful factor for crack propagation tendency when the retained ferrite more than this critical content. It is because that too much ferrite content in martensitic matrix may result in a lower strength structure and crack can propagate easily. In addition, the dual phase structure may introduce more harmful interior stress due to different volume shrinkage between retained phase and matrix.",
author = "Lin, {Yi-Cheng or Y. C.} and Chen, {S. C.}",
year = "2003",
month = "7",
day = "20",
doi = "10.1016/S0924-0136(03)00043-8",
language = "English",
volume = "138",
pages = "22--27",
journal = "Journal of Materials Processing Technology",
issn = "0924-0136",
publisher = "Elsevier BV",
number = "1-3",

}

Effect of residual stress on thermal fatigue in a type 420 martensitic stainless steel weldment. / Lin, Yi-Cheng or Y. C.; Chen, S. C.

In: Journal of Materials Processing Technology, Vol. 138, No. 1-3, 20.07.2003, p. 22-27.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of residual stress on thermal fatigue in a type 420 martensitic stainless steel weldment

AU - Lin, Yi-Cheng or Y. C.

AU - Chen, S. C.

PY - 2003/7/20

Y1 - 2003/7/20

N2 - This paper aimed at the investigation of the effect of residual stress on thermal fatigue in martensitic stainless steel. In this study, a submerged arc welding was utilized. In order to obtain the different magnitude of residual stresses, the parallel heat welding, vibration stress relief, shot peening, and controlled low temperature stress relief processes were used for reduction of residual stresses due to welding. During welding, the thermal cycle of different locations in weldment were recorded. The residual stresses were determined by using the hole-drilling strain-gage method of ASTM standard E837. The retained ferrite content was determined with a digital optical microscope and image process software. The experimental results showed that the residual stresses decrease with increase of thermal fatigue cycle number. This is because that the formation of crack relieves residual stresses of specimen. Because of solidification structure difference, at low thermal fatigue cycle, the density of cracks on near fusion line is the higher than centerline. At high thermal fatigue cycle, the density of crack from near fusion line is lower than centerline, but very longer crack is found easily. The retained ferrite content and thermal fatigue crack tendency exist a critical value. The retained ferrite less than about 31.5vol.% will increase crack propagation tendency. The retained ferrite become a harmful factor for crack propagation tendency when the retained ferrite more than this critical content. It is because that too much ferrite content in martensitic matrix may result in a lower strength structure and crack can propagate easily. In addition, the dual phase structure may introduce more harmful interior stress due to different volume shrinkage between retained phase and matrix.

AB - This paper aimed at the investigation of the effect of residual stress on thermal fatigue in martensitic stainless steel. In this study, a submerged arc welding was utilized. In order to obtain the different magnitude of residual stresses, the parallel heat welding, vibration stress relief, shot peening, and controlled low temperature stress relief processes were used for reduction of residual stresses due to welding. During welding, the thermal cycle of different locations in weldment were recorded. The residual stresses were determined by using the hole-drilling strain-gage method of ASTM standard E837. The retained ferrite content was determined with a digital optical microscope and image process software. The experimental results showed that the residual stresses decrease with increase of thermal fatigue cycle number. This is because that the formation of crack relieves residual stresses of specimen. Because of solidification structure difference, at low thermal fatigue cycle, the density of cracks on near fusion line is the higher than centerline. At high thermal fatigue cycle, the density of crack from near fusion line is lower than centerline, but very longer crack is found easily. The retained ferrite content and thermal fatigue crack tendency exist a critical value. The retained ferrite less than about 31.5vol.% will increase crack propagation tendency. The retained ferrite become a harmful factor for crack propagation tendency when the retained ferrite more than this critical content. It is because that too much ferrite content in martensitic matrix may result in a lower strength structure and crack can propagate easily. In addition, the dual phase structure may introduce more harmful interior stress due to different volume shrinkage between retained phase and matrix.

UR - http://www.scopus.com/inward/record.url?scp=0038142397&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038142397&partnerID=8YFLogxK

U2 - 10.1016/S0924-0136(03)00043-8

DO - 10.1016/S0924-0136(03)00043-8

M3 - Article

AN - SCOPUS:0038142397

VL - 138

SP - 22

EP - 27

JO - Journal of Materials Processing Technology

JF - Journal of Materials Processing Technology

SN - 0924-0136

IS - 1-3

ER -