α″ martensite and amorphous phase transformation mechanism in TiNbTaZr alloy incorporated with TiO2 particles during friction stir processing
Abstract
This work studied the formation of the α″ martensite and amorphous phases of TiNbTaZr alloy incorporated with TiO2 particles during friction stir processing. Formation of the amorphous phase in the top surface mainly results from the dissolution of oxygen, rearrangement of the lattice structure, and dislocations. High-stress stemming caused by dislocations and high-stress concentrations at crystal–amorphous interfaces promote the formation of α″ martensite. Meanwhile, an α″ martensitic transformation is hindered by oxygen diffusion from TiO2 to the matrix, thereby increasing resistance to shear.
Document Type
Journal Article
Date of Publication
2018
Location of the Work
United States
Publication Title
Metallurgical and Materials Transactions A
Publisher
Springer
School
School of Engineering
RAS ID
26712
Copyright
subscription content
Comments
Ran, R., Liu, Y., Wang, L., Lu, E., Xie, L., Lu, W., ... & Zhang, L. C. (2018). α ″Martensite and Amorphous Phase Transformation Mechanism in TiNbTaZr Alloy Incorporated with TiO 2 Particles During Friction Stir Processing. Metallurgical and Materials Transactions A, 49(6), 1986-1991. Available here.