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Title: Mechanical response of aluminium alloys under transient heating and loading conditions
Author: Wilson, I. D.
Awarding Body: University of Wales Swansea
Current Institution: Swansea University
Date of Award: 2000
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The mechanical properties of aluminium have been studied for many years and are well documented under standard loading conditions. However, the properties of the material at elevated temperatures and under transient loading conditions (high heating rate and high strain rate), have not been widely researched and the data available is therefore limited. This type of data is becoming increasingly important as the physical requirements that have to be met and the service environments materials have to withstand are continually increased. This investigation studied the individual and combined effects of temperature, strain rate and heating rate on the mechanical properties of a 6082 aluminium alloy. To allow the behaviour of the material to be examined under a wide range of testing conditions several different test methods had to be employed. These ranged from standard tensile tests to novel testing methods at high strain rates using a Gleeble 1500 thermomechanical simulator. Using Finite Difference based computer-modelling techniques specimens were designed specifically for the high strain rate testing of the 6082 alloy on the Gleeble 1500. These specimens were designed to produce a specific thermal profile during heating, which allowed accurate stress/strain data to be recorded. In addition to uniaxial tensile testing, the viability of miniature disk bend tests for the calculation of tensile properties of 6082 aluminium was investigated. Empirical relationships were produced for the calculation of yield and UTS data for the testing of the 6082 aluminium alloy. The main test program produced data that mapped the behaviour of the 6082 alloy over a wide range of temperature, heating rate and strain rate conditions, from which empirical relationships for proof stress and UTS were produced. These relationships made possible the calculation of mechanical properties of the 6082 alloy for a broad range of test conditions.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available