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Design rules to develop solute lean α+β titanium alloys exhibiting high work-hardening by reorientation induced plasticity.
- Source :
-
Materials Science & Engineering: A . Jan2024, Vol. 890, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- While work-hardening is typically considered in Ti as a prerogative of the β-metastable alloys, this paper introduces a novel perspective, presenting a set of alloy design rules to develop solute lean α + β titanium alloys exhibiting increased work-hardening capabilities. More specifically, reaching this goal is made possible through the development of α + α′ microstructures exhibiting Reorientation Induced Plasticity (RIP) within the α′ martensitic phase. The microstructural requirements for activating RIP and maximizing mechanical properties (i.e., combining high work-hardening, yield strength and ductility levels) are derived from an analysis of the microstructures/mechanical property relationships of various α + α′ samples. A set of design rules is provided. Emphasis is laid on the pivotal role of the chemistry of the α′ martensitic phase in RIP activation and a Molybdenum equivalent chemical criterion is proposed. The α phase is here suggested as a mean to reduce the prior β grain size and the resulting size of the martensite plates. This approach reveals that the versatile thermal treatments leading to α+α' structures broaden the mechanical property landscape, achieving large work-hardening capabilities (typically over 500 MPa) that can be combined with high yield strength (over 800 MPa). [Display omitted] [ABSTRACT FROM AUTHOR]
- Subjects :
- *GRAIN size
*MARTENSITE
*MOLYBDENUM
*TITANIUM alloys
*ALLOYS
*MICROSTRUCTURE
*TITANIUM
Subjects
Details
- Language :
- English
- ISSN :
- 09215093
- Volume :
- 890
- Database :
- Academic Search Index
- Journal :
- Materials Science & Engineering: A
- Publication Type :
- Academic Journal
- Accession number :
- 174410971
- Full Text :
- https://doi.org/10.1016/j.msea.2023.145935