This study investigated the microstructure gradient and interfacial strength of CoCrFeMnNi high-entropy alloy bonded by ultrasonic welding (USW). It was found that bonding occurred after for 1.0 s reached about 1500 N (30 MPa shear strength) 7.0 s. Such featured with ultrafine a grain size 100–200 nm, which resulted from discontinuous dynamic recrystallization induced severe plastic strain peak...

Microstructure evolution during “abc” deformation of commercial-purity titanium was investigated. Continuous dynamic recrystallization (CDRX) played a dominant role in the microstructural changes, although mechanical twinning also contributed to some extent. It found that CDRX developed preferentially at original grain boundaries, thus resulting necklace-type microstructure. This effect attribu...

The continuous drive friction welding of 6061-T6 Al and copper was investigated herein. results show that with an increase in rotation speed, the width welded zone gradually increased generation higher temperatures, grain size dynamic recrystallization on side first decreased then due to combined effect heat force. microhardness bonding surface significantly greater than base materials presence...

A complete theoretical presentation of the Continuum-mechanical, Anisotropic Flow model, based on an anisotropic Flow Enhancement factor (CAFFE model) is given. The CAFFE model is an application of the theory of mixtures with continuous diversity for the case of large polar ice masses in which induced anisotropy occurs. The anisotropic response of the polycrystalline ice is described by a gener...

The superplasticity of commercially pure titanium alloy at high temperature was studied and the dynamic recrystallization phenomenon of the alloy was investigated by using electron back scattered diffraction. A two-step deformation method was used to increase the ductility of the alloy from 188% to 243%. 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

the hot compression tests were carried on x45crniw189 valve steel (x45) in the temperature rangeof 1000– 1200 °c and the strain rate range of 0.004 – 0.5 s-1 in order to study the high temperaturesoftening behavior of this steel. for the exact prediction of flow stress, the effective stress-effectivestrain curves were obtained from experiments under various conditions. on the basis of experimen...