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|Title:||Dynamic tensile properties of magnesium nanocomposite|
|Authors:||Guo, Y.B. |
Split Hopkinson Tensile Bar
|Citation:||Guo, Y.B., Shim, V.P.W., Tan, B.W.F. (2012). Dynamic tensile properties of magnesium nanocomposite. Materials Science Forum 706-709 : 780-785. ScholarBank@NUS Repository. https://doi.org/10.4028/www.scientific.net/MSF.706-709.780|
|Abstract:||In this study, a Mg-6wt%Al alloy and its composite containing 0.22vol% Al 2O 3 nanoparticles are fabricated using a disintegrated melt deposition technique, and samples are subjected to quasi-static and dynamic tension. Compared to quasi-static loading, both materials exhibit significantly higher yield stresses and tensile strengths, much better ductility, and thus a higher energy absorption capacity under dynamic tension. In terms of nano-particle addition, its influence on the mechanical properties are not notable; enhancement of the elastic modulus, yield stress and tensile strength are negligible, and there is a small reduction in ductility. The tensile behaviour obtained in this investigation was compared with results of previous compression tests, and significant tension-compression asymmetry in the response is observed. The tensile yield stress is noticeably larger than that in compression, and the profile of the stress-strain curve for tension differs from that for compression - it is convex upwards for tension, but concave upwards for compression. A possible reason for this asymmetry is the occurrence of twinning in compression and its absence in tension. © 2012 Trans Tech Publications, Switzerland.|
|Source Title:||Materials Science Forum|
|Appears in Collections:||Staff Publications|
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