Crystallography and reorientation mechanism upon deformation in the martensite of an α-α’ Ti-6Al-4V dual-phase microstructure exhibiting high work-hardening rate
نویسندگان
چکیده
The present study provides a fundamental understanding of the crystallography and microscale behavior V-enriched Al-depleted α’ martensite taking place during microstructure formation deformation dual phase α + produced in Ti-6Al-4V. This particular exhibits much larger work-hardening capabilities than conventional wrought product. as-quenched structure is analyzed using Phenomenological Theory Martensite Crystallography (PTMC) coupled with EBSD analyses. approach sheds new light on configuration obtained dual-phase treatment its fine-scale mechanical behavior. preferentially forms into parallel groups 3 self-accommodating variants separated by misorientation 63.26∘/[10¯553¯]α’. TEM analyses additionally show that same group are hitherto unobserved {134¯1}α’ type twin plane. Postmortem after tensile testing demonstrate this twinning plane mobile under deformation. allows martensitic to exhibit remarkable property reorient uniaxial tension. unique shown be intimately related mobility thereby evidencing for first time boundary motion not uniquely associated orthorhombic α’’ but can also occur hexagonal martensite. Quantification Interaction Energy (IE) appears relevant rationalize predict reorientation critical influence parent β grains texture evidenced, while impact mechanism ductility debated.
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ژورنال
عنوان ژورنال: Acta Materialia
سال: 2021
ISSN: ['1873-2453', '1359-6454']
DOI: https://doi.org/10.1016/j.actamat.2020.116530