Weld microstructure development and properties of precipitation-strengthened martensitic stainless steels
- Sandia National Labs., Livermore, CA (United States)
- Carnegie-Mellon Univ., Pittsburgh, PA (United States)
The weld microstructural evolution, mechanical properties and solidification cracking susceptibility of three precipitation-strengthened martensitic stainless steels--PH 13-8 Mo, Custom 450 and 15-5 PH--were investigated. Liquid tin quenching of gas tungsten arc welds revealed that all three welds solidified as single-phase ferrite with a high degree of microsegregation. However, during further solidification and cooling almost complete homogenization occurred as a result of solid-state diffusion. The welds in all three alloys exhibited good resistance to solidification cracking and generally exhibited tensile and impact properties similar to those of the base metal. However, in almost all cases, the weld Charpy impact energies were somewhat less than those of the base metals. The cracking behavior and mechanical properties are discussed in terms of microstructural evolution.
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6443015
- Journal Information:
- Welding Journal, Journal Name: Welding Journal Vol. 78:8; ISSN 0043-2296; ISSN WEJUA3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
ARC WELDING
CRACK PROPAGATION
FABRICATION
GAS METAL-ARC WELDING
GAS TUNGSTEN-ARC WELDING
HARDENING
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PHASE TRANSFORMATIONS
PRECIPITATION HARDENING
SOLIDIFICATION
STAINLESS STEELS
STEELS
WELDED JOINTS
WELDING