Open AccessDynamic Mechanical Behaviors of 6082-T6 Aluminum Alloy
Author(s) -
Peng Yibo,
Gang Wang,
Tailin Zhu,
Pan Shangfeng,
Yiming Rong
Publication year - 2013
Publication title -
advances in mechanical engineering/advances in mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 40
eISSN - 1687-8140
pISSN - 1687-8132
DOI - 10.1155/2013/878016
Subject(s) - materials science , strain rate , ultimate tensile strength , flow stress , strain (injury) , alloy , composite material , fracture (geology) , stress (linguistics) , tensile testing , slow strain rate testing , universal testing machine , aluminium , yield (engineering) , deformation (meteorology) , metallurgy , structural engineering , engineering , medicine , linguistics , philosophy , stress corrosion cracking
The structural components of high speed trains are usually made of aluminum alloys, for example, 6082. The dynamic mechanical behavior of the material is one of key factors considered in structural design and safety assessment. In this paper, dynamic mechanical experiments were conducted with strain rate ranging from 0.001 s−1 to 100 s−1 using Instron tensile testing machine. The true stress-strain curves were fitted based on experimental data. Johnson-Cook model of 6082-T6 aluminum alloy was built to investigate the effect of strain and strain rate on flow stress. It has shown that the flow stress was sensitive to the strain rate. Yield strength and tensile strength increased with a high strain rate, which showed strain rate effect to some extent. Fracture analysis was carried out by using Backscattered Electron imaging (BSE). As strain rate increased, more precipitates were generated in fracture