Mechanical behaviour of magnesium alloy AZ91D using split Hopkinson tensile bar (SHTB)

I. R. Ahmad; D. Wei Shu

doi:10.1117/12.851945

14 April 2010 Mechanical behaviour of magnesium alloy AZ91D using split Hopkinson tensile bar (SHTB)

I. R. Ahmad, D. Wei Shu

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 75222C (2010) https://doi.org/10.1117/12.851945
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

Abstract

Magnesium alloys have been increasingly used in the automobile, communication and aerospace industries due to their low density, high specific strength and good castability. Higher speed in vehicles, development in weaponry and high speed metal working all are characterized with high rates of loading. In current study, a cast magnesium alloys AZ91D has been investigated at strain rates in the range between 300 s^-1 and 1250 s^-1. Relatively uniform strain rates are observed at lower strain rates. However an exception is observed for maximum strain rate tested, where a nearly constant strain rate of 1252 s^-1 is observed over most of the test duration. Approximately 25% increase in stress is noticed at a strain rate of 1252 s^-1 as compare to the stress at a strain rate of 346 s^-1. The alloy AZ91D is observed to be more strain rate sensitive for strain rate higher than 1000 s^-1. A decrease in strain rate sensitivity is observed with increasing percentage strain in the specimen.

Citation Download Citation

I. R. Ahmad and D. Wei Shu "Mechanical behaviour of magnesium alloy AZ91D using split Hopkinson tensile bar (SHTB)", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75222C (14 April 2010); https://doi.org/10.1117/12.851945

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