Compressive properties of AM50 and AZ91D alloys using split Hopkinson pressure bar

I. R. Ahmad; D. Wei Shu

doi:10.1117/12.845825

20 October 2009 Compressive properties of AM50 and AZ91D alloys using split Hopkinson pressure bar

I. R. Ahmad, D. Wei Shu

Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 749326 (2009) https://doi.org/10.1117/12.845825
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China

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, two magnesium alloys AZ91D and AM50 have been investigated at strain rates in the range between 300 s^-1 and 1250 s^-1. For AZ91D, the stress is first increased and than decreased with strain rate between 335/ s^-1 and 1175 s^-1. For AM50, a monotonic increase in the stress is observed with increasing strain rate from 438/ s^-1 to 1238 s^-1. The stress is much higher at higher strain rates than what is at quasi-static strain rate for both alloys. For nearly same strain rate, higher stresses are observed for AZ91D than AM50, although this difference is less at higher strain rates. The strain rate sensitivity of AZ91D first increased with increasing strain rate and than decreased. In case of AM50, the strain rate sensitivity has an overall increasing trend.

Citation Download Citation

I. R. Ahmad and D. Wei Shu "Compressive properties of AM50 and AZ91D alloys using split Hopkinson pressure bar", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749326 (20 October 2009); https://doi.org/10.1117/12.845825

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