Susceptibility to hot cracking and weldment heat treatment of haynes 230 superalloy

C. M. Cheng, C. P. Chou, I. K. Lee, I. C. Kuo

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

This study investigates the susceptibility of hot cracking and weldment heat treatment of Haynes 230 superalloy. The Varestriant test was conducted to evaluate this susceptibility. Welding was performed by gas tungsten arc welding (GTAW) and plasma arc welding (PAW) with stress relief heat treatment and solid solution heat treatment. A tensile test is then performed to measure the changes in the mechanical properties of the heat-treated material. The results indicate that the number of thermal cycles does not affect the susceptibility of Haynes 230 superalloy to hot cracking. However, it does increase the strain. In weldment of heat treatment, stress relief annealing increases the yield strength and tensile strength of the welded parts. The section of the tensile specimens shows fibrous fractures on the welded parts, regardless of whether they are heat-treated.

Original languageEnglish
Pages (from-to)685-690
Number of pages6
JournalJournal of Materials Science and Technology
Volume22
Issue number5
Publication statusPublished - 2006 Sep 1

Keywords

  • Haynes 230 super alloy
  • Hot cracking
  • Stress relief annealing
  • Susceptibility
  • Varestriant test

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry

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