论文部分内容阅读
In the present work,stress relaxation tests,high-resolution transmission electron microscopy(HRTEM)and molecular dynamics(MD)simulations were conducted on coarse-grained(cg),nanograined(ng)and nanotwinned(nt)copper at temperatures ranging from room temperature to 75 ℃.The comprehensive investigations provide sufficient information for the building-up of a formula to describe the time,stress and temperature-dependent deformation and clarify the relationship among the strain rate sensitivity parameter,stress exponent and activation volume.