Experimental and computational study on the load-jump tests of Al–Mg solid–solution alloy using instrumented indentation technique
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چکیده
Constant-load tests and load-jump tests were carried out using a microindenter in Al–5.3 mol% Mg solid–solution alloy. When the representative stress σ̄ beneath the indenter decreases to a critical stress level, σ̄c ∼= 61 MPa, during indentation creep at 573 K, the stress exponent n for creep changes from 5 (σ̄ > σ̄c) to 3 (σ̄ < σ̄c). With load-jump tests in the stress range of n= 3, instantaneous plastic deformation (IPD) is initiated at stresses of σ̄ > 54 MPa or more. When IPD does not occur, the n value obtained from load-jump tests agrees fairly well with that of constant-load t l ©
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Experimental and computational creep characterization of Al–Mg solid-solution alloy through instrumented indentation
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