Title

Investigation of Deformation Mechanisms in β-Type Ti-35Nb-2Ta-3Zr Alloy via FSP Leading to Surface Strengthening

Document Type

Journal Article

Publisher

Springer Boston

School

School of Engineering

RAS ID

19673

Funders

NSF, National Science Foundation;

NSF, National Science Foundation

Grant Number

51302168, 81171738

Comments

Originally published as: Wang, L., Qu, J., Chen, L., Meng, Q., Zhang, L.-C., Qin, J., Zhang, D., Lu, W. (2015). Investigation of Deformation Mechanisms in β-Type Ti-35Nb-2Ta-3Zr Alloy via FSP Leading to Surface Strengthening in Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 46(11), 4813-4818. Available here.

Abstract

Friction-stir processing (FSP) is used to prepare Ti-35Nb-2Ta-3Zr alloys via different processing routes. Dislocation walls and tangles, deformation-induced α″ martensite, and deformation-induced ω phase are observed. The dominant deformation mechanisms are altered from deformation-induced α″ martensitic transformation and dislocation walls to twinning upon increasing the FSP passes. A reverse deformation-induced ω to β transformation and de-twinning process are observed together with grain refinement to the nanoscale. Meanwhile, compressive distortions along [0001]ω direction are favorable for the transformation from ω to β.

DOI

10.1007/s11661-015-3089-8