ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Samples of AZ31 wrought magnesium alloy are hot extruded into forward direction withvarious initial billet temperatures and extrusion ratios (ERs). Usually the insufficient roomtemperature formability of magnesium wrought alloys makes processing steps like rolling, extrusionetc. difficult, thus limiting their use for rolled or wrought parts. However, in this paper experimentis preformed under the hot forward extrusion process for AZ31 wrought magnesium alloy withdifferent important parameters. Major process parameters such as punch speed, billet temperaturesand ERs are considered and applied to the hot extrusion process with a constant value of the dieland. The influence of different billet temperatures and ERs on the hot forward extrusion process isinvestigated and analyzed in terms of the grain flow, microstructure, grain size and hardnessdistribution of formed part for magnesium and Mg alloy. Maximum forming loads for various mainparameters is tackled and checked to know the optimum forming load for hot forward extrusionprocess. Also finest grain sizes and an inhomogeneous microstructure of extruded parts seem tooccur near the die land of tool-set due to the anisotropic plastic behavior during the hot extrusionprocess. Extrusion properties such as extrusion load, grain size, micro hardness and surface qualityare compared between the main parameters during the hot forward extrusion process. In addition itis easily disclosed from the experiment results that the die land designed for safe tool-set plays akey role in improving the mechanical properties of formed product during hot forward extrusionprocess for AZ31 magnesium alloy
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.1818.pdf
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