Abstract
Abstract In order to investigate the micromechanical behavior of forged 7050 aluminum alloy with different heat treatment conditions, microindentation experiments of 7050-T7451 and 7050-T7452 were performed with various maximum indentation loads and various loading speeds. A non-destructive instrumental approach was applied to indicate mechanical properties such as Young’s modulus E , microhardness H , initial yield stress σ y and strain hardening exponent n using the available experimental indentation P – h curves from the microindentation tests. The experimental results revealed that loading speed exerted little influence on measurement of E and H . E decreased rapidly because of the indentation damage accumulation, and H decreased with the increase of indentation load, which showed strong indentation size effects. Dimensionless functions П 1 and П 2 were used to describe the plasticity constitutive equations and revealed that the heat treatment conditions influenced the micromechanical properties. H and σ y tested from the microindentation of 7050-T7451 were higher than those of 7050-T7452, and microindentation plasticity constitutive equations were obtained by using Hookean elastic and power-law plastic stress–strain relation equations, which were verified by finite element method (FEM) simulation well.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call