Please use this identifier to cite or link to this item:
|Title:||Grain size dependent tensile behavior of Mg-3%Al alloy at elevated temperatures|
|Citation:||Mallick, A., Vedantam, S., Lu, L. (2009-07-25). Grain size dependent tensile behavior of Mg-3%Al alloy at elevated temperatures. Materials Science and Engineering A 515 (1-2) : 14-18. ScholarBank@NUS Repository. https://doi.org/10.1016/j.msea.2009.03.002|
|Abstract:||In this study, we experimentally investigate the effect of grain size on the tensile properties of Mg-3%Al alloys at elevated temperatures. Bulk nanostructured Mg-3%Al alloys were prepared by mechanical alloying followed by conventional sintering and extrusion. The microstructure and grain size were investigated by XRD, field emission scanning electron microscope (FESEM) and optical microscope. The formation of second phase particles was observed in nanostructured powder and the extruded bulk samples. Tensile tests were performed at elevated temperatures up to 250 °C and the yield strength, tensile strength and elongation to failure were measured for microcrystalline and nanocrystalline samples. Remarkably, the strain to failure was observed to be non-monotonic with temperature with the failure strain increasing up to a critical temperature and decreasing thereafter. This critical temperature was found to be strongly dependent on grain size. This phenomenon is attributed to a competition between uniform elongation and necking deformation. The latter dominates at higher temperatures due to decreased strain hardening, particularly in the fine grained samples. © 2009 Elsevier B.V. All rights reserved.|
|Source Title:||Materials Science and Engineering A|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 21, 2019
WEB OF SCIENCETM
checked on Feb 12, 2019
checked on Feb 9, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.