The effect of post-weld heat-treatment on mechanical-properties and residual-stresses mapping in welded structural steel

✍ Scribed by A.G. Olabi; M.S.J. Hashmi

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 324 KB
• Volume: 55
• Category: Article
• ISSN: 0924-0136
• DOI: 10.1016/0924-0136(95)01794-1

✦ Synopsis

This paper presents some results on the effect of post-weld heat-treatment on the mechanical properties and residual stresses of I-beam welded box-sections in structural steel material.

In order to assess the effect of post-weld heat-treatment on the mechanical properties, microhardness, tensile strength and impact tests have been employed on the welded joint under two conditions: first, the as-welded condition; second, the as-heat-treated condition.

The hole-drilling method has been used to estimate the magnitude and distribution of residual stress before and after the application of post-weld heat-treatment.

The results show that the post-weld heat-treatment:0) improves the toughness by about 15%, without making any significant difference to the tensile strength and the hardness; and (ii) has the significant effect of reducing the residual stresses by about 70%.