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Graded hierarchical microstructure and mechanical property of electron beam melted Ti–5Al–5Mo–5V–3Cr–1Zr.
- Source :
-
Materials Science & Engineering: A . Sep2021, Vol. 825, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- The layer-wise additive manufacturing process offers a unique approach to achieve a novel graded microstructure which can fulfill the conflicting requirement of contradictory properties. The present study investigated microstructure evolution and mechanical properties of a near β alloy Ti–5Al–5Mo–5V–3Cr–1Zr fabricated by additive manufacturing using electron beam melting. In combination, the high preheating temperature in electron beam melting, the low β transus (850 °C) in Ti–5Al–5Mo–5V–3Cr–1Zr, and the increasingly accumulated heat with build height resulted in an in-situ formed graded hierarchical microstructure from an α+β lamellar microstructure at the specimen bottom to an α p +α s bi-lamellar microstructure at the specimen top. Such a gradually changing microstructure was obtained by the same electron beam melting parameter set, and its formation was related to the controlled secondary α precipitation through manipulating the stability of metastable β-phase at different specimen heights. The resultant hardening effect in the bi-lamellar microstructure was attributed to the precipitation of fine secondary α. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ELECTRON beam furnaces
*ELECTRON beams
*MICROSTRUCTURE
Subjects
Details
- Language :
- English
- ISSN :
- 09215093
- Volume :
- 825
- Database :
- Academic Search Index
- Journal :
- Materials Science & Engineering: A
- Publication Type :
- Academic Journal
- Accession number :
- 152290509
- Full Text :
- https://doi.org/10.1016/j.msea.2021.141914