Effect of postweld heat treatment on weld metal impact toughness of a semi-austenitic PH stainless steel

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Welding Journal (Miami); (United States)

OSTI ID:6890590

Sivaramakrishnan, N; Raja, K S; Prasad Rao, K ^[1]

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1. Indian Inst. of Tech., Madras (India). Dept. of Metallurgical Engineering

Semi-austenitic precipitation hardened PH stainless steel plates, PH 15-7 Mo (Cu), 6.14 mm thick were autogenously welded using the electron beam welding (EBW) and plasma arc welding (PAW) processes. Impact toughness studies using Charpy V-notch samples (V-notch at the center of the weld metal) showed that EB welds had higher impact toughness than PA welds in various identical postweld heat treated (PWHT) conditions. Based on hardness and impact toughness values, the optimal postweld heat treated conditions are recommended. The effect of retained austenite, carbides and delta ferrite on impact toughness of the welds are discussed.

• OSTI ID: 6890590
• Journal Information: Welding Journal (Miami); (United States), Journal Name: Welding Journal (Miami); (United States) Vol. 73:8; ISSN 0043-2296; ISSN WEJUA3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ARC WELDING
ELECTRON BEAM WELDING
FABRICATION
FRACTURE PROPERTIES
HARDENING
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MECHANICAL PROPERTIES
PLASMA ARC WELDING
PRECIPITATION HARDENING
STAINLESS STEELS
STEELS
WELDED JOINTS
WELDING