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The microstructure and mechanical behaviors of the Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy produced by laser melting deposition.
- Source :
-
Materials Characterization . Nov2014, Vol. 97, p132-139. 8p. - Publication Year :
- 2014
-
Abstract
- The microstructure and mechanical properties of the Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy produced by laser melting deposition have been investigated. The columnar grains of the Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy due to the layer-by-layer epitaxial growth from the underlying template grains during laser melting deposition, which is roughly parallel to the deposition direction, had been found by optical microscopy; strong 10 1 ¯ 2 α crystallographic texture has been confirmed by X-ray diffraction and electron backscattered diffraction. Depending on the last heating history, the microstructure of the alloy undergoes a continued change opposite to the deposition direction: martensitic α′ (transformed β); coarsened primary α laths with transformed β; coarsened primary α laths; and the fine basketweave microstructure with a few coarsened α laths or annealed martensitic α′. The average Vickers micro-hardness value of the alloy is 364 HV. The alloy parallel to the deposition direction presents lower tensile strength (925 MPa) and better elongation (18.8%), compared with 1025 MPa and 8.2% of that vertical to the deposition direction, which has been discussed using its microstructure characterization. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10445803
- Volume :
- 97
- Database :
- Academic Search Index
- Journal :
- Materials Characterization
- Publication Type :
- Academic Journal
- Accession number :
- 99068564
- Full Text :
- https://doi.org/10.1016/j.matchar.2014.09.002