Evaluation of backfilled solidification cracks in austenitic stainless welds in relationship to evaluation of hot cracking

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Welding Journal (Miami); (United States)

OSTI ID:6354890

Lundin, C D; Qiao, C Y.P. ^[1]; Lee, C H

---

1. Univ. of Tennessee, Knoxville, TN (United States). Materials Science and Engineering Dept.

This paper describes the significance of the backfilling phenomenon in solidification cracks on the evaluation of the weldability of stainless steels. Backfilling of solidification cracks was systematically evaluated in terms of: (1) Primary solidification mode (austenitic or ferritic); (2) Augmented strain levels (2 and 4% Varestraint Test); (3) Type of stainless steel (316 and 347); and (4) Location in the weld and length of solidification cracks. The extent of backfilling was found to be a function of the location of the crack in the weld and the solidification crack length, such that the shorter and narrower the crack, the greater is the potential for backfilling. The greatest extent of backfilling occurs at the center of the weld where the temperature gradient is most shallow.

• OSTI ID: 6354890
• Journal Information: Welding Journal (Miami); (United States), Journal Name: Welding Journal (Miami); (United States) Vol. 72:7; 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
CHEMICAL COMPOSITION
CRACK PROPAGATION
CRACKS
EVALUATION
GRAIN BOUNDARIES
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MICROSTRUCTURE
PHASE TRANSFORMATIONS
SOLIDIFICATION
STAINLESS STEELS
STEELS
WELDABILITY
WELDED JOINTS