ISSN:
1662-8985
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:
Research is currently being conducted on the feasibility of hydroforming extrudedmagnesium tubes to integrate multiple parts into a single hydroformed section. Among otherapplications, such sections would reduce the weight of both cars and planes, particularly when usedin the vehicle frame. This would lead to either reduced fuel costs, or the ability to carry anincreased payload. Magnesium generally has limited ductility, which in the case of the currentextruded tubes is even further reduced at the extrusion seams. These are locations where thematerial flow separates and rejoins during extrusion and are unavoidable when a hollow profile dieis used. When the tubes were stressed in a circumferential direction, tube ruptures consistentlyoccurred along the extrusion seams of the tubes. This led to the current project, an inquiry into theexact cause of failure at these locations. The creation of irregularities at the seams, such asprecipitate dispersions, local texture changes, grain size changes and entrained material, isdiscussed. These irregularities are considered together with their roles in producing the failures.The results are summarized and the most fruitful directions for future work are outlined
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.15-17.439.pdf
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