Temperature rise up to melting under quasi-static loading conditions induced by adiabatic shear banding

Abstract

Adiabatic shear banding propagating at very large speed was observed during the unstable fracture of TRIP-TWIP β -metastable Ti-12 wt% Mo alloy under quasi-static loading. The fusible coating method was used with five different coatings to assess the predicted temperature variations. Two one-dimensional models are compared based on parameters measured on fractured samples of Ti-12 wt% Mo alloy. The importance of the thickness of the shear band as well as of the shearing time are highlighted. A new two-dimensional model is then developed to represent the nucleation and propagation of the shear band. Finally, an analytical one-dimensional model is proposed to estimate the temperature rise occurring during adiabatic shear banding of other metallic alloys from easily accessible physical and mechanical properties.

Keywords

• Adiabatic shear banding
• Temperature rise
• Fusible coating method
• Two-dimensional heat diffusion model
• Metastable Ti alloy