An Experimental Investigation on the Strain Rate Sensitivity of a Severely Deformed Aluminum Alloy

Fereshteh-Saniee, F.; Sepahi-Boroujeni, Saeid; Lahmi, S.; Majzoobi, G.H.

doi:10.1007/s11340-014-9968-x

Cited by 5 publications

(1 citation statement)

References 29 publications

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“…In practice, they may be subjected to dynamic shock loading during service. For example, the striking of miscellaneous objects on armaments, the occurrence of flying bodies on landing and automotive driving collisions are cases in which the mechanical components experience high strain rate loadings [24]. Furthermore, understanding the material behaviour during deformation under different strain rates is of major importance for further developing these engineering applications [25].…”

Section: Introductionmentioning

confidence: 99%

Effect of dynamic plastic deformation on the microstructure and mechanical properties of an Al–Zn–Mg alloy

Afifi

Wang

Langdon

2020

Materials Science and Engineering: A

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A supersaturated Al-Zn-Mg alloy was processed by dynamic plastic deformation (DPD) using a Split-Hopkinson pressure bar (SHPB) facility with strain range from 0.5 to 1.5 and then subjected to compressive testing at strain rates of 1×10 -3 ~ 4×10 3 s -1 . The results show that there is concurrent occurrence of grain refinement, increase in dislocation density and precipitation of fine precipitates in different morphologies during DPD at strain over 1. This enhances the yield strength of the Al alloy after DPD over the as-received material in peakaging state (T6). Grains are refined through the formation of low angle grain boundaries (LAGBs) by rearrangement of dislocations which leads to the subdivision of original grains.Heterogeneous coarse precipitates mainly of T (Al 20 Cu 2 Mn 3 ) and E (Al 18 Mg 3 Cr 2 ) phases distribute along dislocations and grain boundaries after DPD. Dynamic precipitation of very fine η' and η during DPD occurs where the volume fraction of precipitates increases with increasing the number of presses. The influence of precipitates on the strain rate sensitivity is also discussed.

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Section: Introductionmentioning

confidence: 99%