Weld thermal cycles and precipitation effects in Ti-V-containing HSLA steels

Journal Article · Sun Oct 01 00:00:00 EDT 1989 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (USA)

DOI:https://doi.org/10.1007/BF02650295· OSTI ID:6788951

Wang, G R; Lau, T W; Weatherly, G C; North, T H ^[1]

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1. Toronto Univ., ON (Canada). Dept. of Metallurgy and Materials Science

Particle dissolution, precipitation, and grain-coarsening effects were examined in the heat affected zone of submerged arc welds deposited at 3 and 6 kJ/mm heat inputs on three Ti-V-containing steels. The Ti-bearing steel (0.014 pct Ti) showed little change in the TiN particle distribution on welding in agreement with calculations which demonstrated limited TiN solution during the weld thermal cycle. For the high-V, low-Ti steel (0.093 pct V, 0.002 pct Ti), the V-rich particles in the baseplate dissolved and Ti-rich precipitates formed during the heating leg of the cycle, while V-rich particles precipitated again on cooling. The third steel (0.014 pct Ti, 0.08 pct V) contained a wide distribution of particle compositions. On welding, the Ti-rich cuboidal precipitates did not dissolve, while the V-rich spheroidal precipitates did dissolve. No reprecipitation was observed on cooling. The different behaviors of the three steels related to the dissolution of precipitates in the baseplate and the available thermodynamic driving force for reprecipitation on cooling.

• OSTI ID: 6788951
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (USA), Vol. 20A:10; ISSN 0360-2133
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STEELS
SUBMERGED ARC WELDING
CHEMICAL COMPOSITION
GRAIN BOUNDARIES
THERMAL CYCLING
THERMODYNAMICS
TITANIUM ALLOYS
VANADIUM ALLOYS
ALLOYS
ARC WELDING
CRYSTAL STRUCTURE
FABRICATION
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MICROSTRUCTURE
WELDING
360102* - Metals & Alloys- Structure & Phase Studies
360101 - Metals & Alloys- Preparation & Fabrication
360104 - Metals & Alloys- Physical Properties