MECHANISMS OF EQUIAXED GRAIN FORMATION IN FERRITIC STAINLESS-STEEL GAS TUNGSTEN ARE WELDS

Authors
VILLAFUERTE JC KERR HW DAVID SA
Citation
Jc. Villafuerte et al., MECHANISMS OF EQUIAXED GRAIN FORMATION IN FERRITIC STAINLESS-STEEL GAS TUNGSTEN ARE WELDS, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 194(2), 1995, pp. 187-191
Citations number
19
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
194
Issue
2
Year of publication
1995
Pages
187 - 191
Database
ISI
SICI code
0921-5093(1995)194:2<187:MOEGFI>2.0.ZU;2-Q
Abstract
Mechanisms of providing nuclei for equiaxed grains in gas tungsten are welds in ferritic stainless steel were examined. Tin-quenching of the solid-liquid interface revealed that TiN particles in commercial stee ls could act as heterogeneous nucleation sites. Direct additions of Ti N also promoted an equiaxed region. However, no evidence for equiaxed grain formation by dendrite fragmentation was observed, despite the fa ct that titanium additions did produce a more branched dendritic struc ture.