Self accomodation morphology of martensite variants in Zr2.5wt%Nb alloy
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Designing hetero-structured ultra-strong and ductile Zr-2.5Nb alloys: Utilizing the grain size-dependent martensite transformation during quenching
2022, Journal of Materials Science and TechnologyCitation Excerpt :Normally, in Zr-Nb alloys, after quenching from the β phase field, the microstructure is typically characterized by the intersections of different variants of α' martensite (so-called basket-like structure): several first-generation martensites propagate across the original coarse β grain, followed by the appearance of variants of lower generations, which further subdivide the parent grain into smaller domains until these domains are completely consumed [47]. In this type of microstructure, the martensite plates of successive generations are often approximately perpendicular to each other, or alternatively, forming a V-shape [33,34,47]. With obviously different sizes, the martensite plates of different generations can therefore be easily distinguished.
Variant selection during BCC to HCP phase transformation in selective laser melted Ti-6Al-4V
2022, MaterialiaCitation Excerpt :Since Burgers identified the specific orientation relationship (OR) associated with the phase transformation from the body-centered cubic crystal structure to the hexagonal closed packed crystal structure in 1934 [1], research on this phase transformation has been conducted extensively [2–7].
On the role of volumetric energy density in the microstructure and mechanical properties of laser powder bed fusion Ti-6Al-4V alloy
2022, Additive ManufacturingCitation Excerpt :H.Z. Zhong et al. reported that the order of α′ can be obtained by the misorientation angle of grain boundaries and specific morphology of α′ cluster [33]. Because the L-PBF-produced Ti64 alloy obeys the BOR, the final α′ grains need to reduce the shape strain during solid transformation to achieve self-accommodation [51–53]. Hence, the primary martensite plates are formed in the first layers and present as vertical morphology (misorientation angle ~ 90°) since the larger driving force.
Atomistic simulation of martensite microstructural evolution during temperature driven β→α transition in pure titanium
2022, Computational Materials Science