Some effects of yttrium on Ti-5522S alloy welds
- Univ. of Dayton Research Inst., OH
Some Ti-5Al-5Sn-2Mo-2Zr-0.25Si alloy sheet was found to contain 250 ppM yttrium which had been intentionally added by the alloy supplier. Bead-on-plate welds of this sheet were evaluated microstructurally as well as for strength and toughness. These data are compared to those obtained with the same alloy which was not doped with yttrium and also to results obtained with Ti-6Al-4V alloy. The yttrium additions were deleterious to the mechanical properties of Ti-5Al-5Sn-2Mo-2Zr-0.25Si alloy welds. The presence of yttrium is shown to be accompanied by the formation of a bead-like grain boundary phase. This phase, which apparently causes the loss in toughness, is shown to be pores and not correspondent with any chemical segregation, including yttrium.
- OSTI ID:
- 7204876
- Journal Information:
- Weld. J. (Miami); (United States), Journal Name: Weld. J. (Miami); (United States) Vol. 57:7; ISSN WEJUA
- 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
ALUMINIUM ALLOYS
CHALCOGENIDES
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
FRACTURE PROPERTIES
GRAIN BOUNDARIES
JOINTS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
OXIDES
OXYGEN COMPOUNDS
SEGREGATION
TIN ALLOYS
TITANIUM ALLOYS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VANADIUM ALLOYS
WELDED JOINTS
YTTRIUM
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM ALLOYS