Deformation and failure response of 304L stainless steel SMAW joint under dynamic shear loading

Woei-Shyan Lee, Jen I. Cheng, Chi Feng Lin

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The dynamic shear deformation behavior and fracture characteristics of 304L stainless steel shielded metal arc welding (SMAW) joint are studied experimentally with regard to the relations between mechanical properties and strain rate. Thin-wall tubular specimens are deformed at room temperature under strain rates in the range of 8 × 102 to 2.8 × 103s-1 using a torsional split-Hopkinson bar. The results indicate that the strain rate has a significant influence on the mechanical properties and fracture response of the tested SMAW joints. It is found that the flow stress, total shear strain to failure, work hardening rate and strain rate sensitivity all increase with increasing strain rate, but that the activation volume decreases. The observed dynamic shear deformation behavior is modeled using the Kobayashi-Dodd constitutive law, and it is shown that the predicted results are in good agreement with the experimental data. Fractographic analysis using scanning electron microscopy reveals that the tested specimens all fracture within their fusion zones, and that the primary failure mechanism is one of the extensive localized shearing. The fracture surfaces are characterized by the presence of many dimples. A higher strain rate tends to reduce the size of the dimples and to increase their density. The observed fracture features are closely related to the preceding flow behavior.

Original languageEnglish
Pages (from-to)206-215
Number of pages10
JournalMaterials Science and Engineering A
Volume381
Issue number1-2
DOIs
Publication statusPublished - 2004 Sep 15

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arc welding
Stainless Steel
Electric arc welding
strain rate
Strain rate
stainless steels
Stainless steel
Metals
shear
metals
Shear deformation
mechanical properties
thin walls
Mechanical properties
work hardening
shear strain
Shear strain
Plastic flow
shearing
Shearing

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "The dynamic shear deformation behavior and fracture characteristics of 304L stainless steel shielded metal arc welding (SMAW) joint are studied experimentally with regard to the relations between mechanical properties and strain rate. Thin-wall tubular specimens are deformed at room temperature under strain rates in the range of 8 × 102 to 2.8 × 103s-1 using a torsional split-Hopkinson bar. The results indicate that the strain rate has a significant influence on the mechanical properties and fracture response of the tested SMAW joints. It is found that the flow stress, total shear strain to failure, work hardening rate and strain rate sensitivity all increase with increasing strain rate, but that the activation volume decreases. The observed dynamic shear deformation behavior is modeled using the Kobayashi-Dodd constitutive law, and it is shown that the predicted results are in good agreement with the experimental data. Fractographic analysis using scanning electron microscopy reveals that the tested specimens all fracture within their fusion zones, and that the primary failure mechanism is one of the extensive localized shearing. The fracture surfaces are characterized by the presence of many dimples. A higher strain rate tends to reduce the size of the dimples and to increase their density. The observed fracture features are closely related to the preceding flow behavior.",
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Deformation and failure response of 304L stainless steel SMAW joint under dynamic shear loading. / Lee, Woei-Shyan; Cheng, Jen I.; Lin, Chi Feng.

In: Materials Science and Engineering A, Vol. 381, No. 1-2, 15.09.2004, p. 206-215.

Research output: Contribution to journalArticle

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