ISSN:
1013-9826
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:
When a suitable pulse current is introduced into a metal die containing a crack, the currentconcentration effect is immediately apparent, small welded joints are formed at a small sphere nearthe crack tip inside the metal die by metal melting as a result of the heat concentration effect. An axialsymmetric metal die with a half–embedded crack on the top face is the object studied. The highintensity pulse current is switched on and flows from the outer to the inner surface of the hollow metaldie. The complex function method is used to solve for the temperature field around the crack tip at themoment when the pulse current is switched on. The expression for the temperature field provides thebasis for determining the current density and current direction. The experiment surveys show that thetemperature around the crack tip grows up instantly above the melting point of the metal, the roundcrack tip is melted
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.765.pdf
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