An evaluation of heat-affected zone liquation cracking susceptibility, Part 1: Development of a method for quantification

Journal Article · Wed Mar 31 23:00:00 EST 1993 · Welding Journal (Miami); (United States)

OSTI ID:6522729

Lin, W; Lippold, J C ^[1]; Baeslack, III, W A ^[2]

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1. Edison Welding Inst., Columbus, OH (United States)
2. Ohio State Univ., Columbus (United States)

A new methodology has been developed for quantifying heat-affected zone (HAZ) liquation cracking susceptibility. This methodology characterizes a thermal crack-susceptible region (CSR) in the HAZ. The thermal CSR was theoretically derived based on the ductility of a material during welding as obtained from the Gleeble hot-ductility test and the criteria assumed in the development of liquation cracking theories. This CSR was experimentally verified using longitudinal- and spot-Varestraint tests performed on A-286 and Type 310 stainless steels. The thermal CSR is material-specific and represents a true quantification of liquation cracking susceptibility. The development of this methodology has (1) elucidated the physical relationship among weldability test results, liquation cracking theories and material properties; (2) provided a more precise interpretation of hot-ductility, spot- and longitudinal-Varestraint tests; (3) defined a method for determining a material-specific measure of HAZ liquation cracking susceptibility; (4) eliminated the inconsistency among certain weldability test results; (5) added important insight regarding the mechanics of HAZ liquation cracking, and (6) confirmed the criterion assumed in the development of liquation cracking theories, which states that cracking results from the localized loss of grain boundary ductility due to liquation. This paper addresses the theoretical background and experimental procedure involved in the development of the methodology.

• OSTI ID: 6522729
• Journal Information: Welding Journal (Miami); (United States), Journal Name: Welding Journal (Miami); (United States) Vol. 72:4; 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
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRACK PROPAGATION
CRYSTAL STRUCTURE
DUCTILITY
EVALUATION
FABRICATION
GRAIN BOUNDARIES
HEAT AFFECTED ZONE
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
STAINLESS STEEL-310
STAINLESS STEELS
STEEL-CR25NI20
STEELS
STRAINS
STRESSES
TENSILE PROPERTIES
TESTING
THERMAL STRESSES
WELDABILITY
WELDING
ZONES