Influence of strain rate on stress induced martensitic transformation in β solution treated TB8 alloy

• Published in: Journal of alloys and compounds Vol. 565; pp. 1 - 5
• Main Authors: Bo, Tang, Bin, Tang, Fengbo, Han, Guanjun, Yang, Jinshan, Li
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15-07-2013; Elsevier
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Interface structure and roughness; Martensitic transformations; Materials science; Mechanical and acoustical properties; Mechanical and acoustical properties of condensed matter; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physical properties of thin films, nonelectronic; Physics; Solid surfaces and solid-solid interfaces; Strain rate; Stress induced martensitic transformation; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); TB8; Trigger stress; Trigger stress; TB8; Stress induced martensitic transformation; Strain rate; Interface structure; Solution heat treatment; Martensitic transformations; Mechanical properties; Stress effects; Microstructure; Martensite; Dislocations
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.02.173

•Strain rate on the stress induced martensitic transformation was investigated.•The results show that the induced stress increases with the strain rate increasing.•Analysis shows that the microstructures are composed of needle sheet α″ and β.•The dependence of the induced stress on strain rate was explained.•It is in terms of the interface structure of martensitic dislocation model.
The influence of strain rate on the stress induced martensitic transformation in β solution treated TB8 alloy was investigated. The results show that the stress induced martensitic transformation takes place in β solution treated TB8 alloy with the increase of strain rate from 500s−1 to 2000s−1, and the trigger stress rises with the increase of the strain rate. Test result shows that the microstructures are composed of needle sheet α′′ and β matrix for all dynamic compression specimens at all strain rates. The dependence of the trigger stress on strain rate was explained in terms of the interface structure of martensite dislocation model.