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5.28】Prof. Dr. L.E.Murr
Topic:A Review of UTEP...
 
2010-05-26 | 文章来源:李薰奖办公室        【 】【打印】【关闭

Topic: A Review of UTEP Friction-Stir Welding Research on Dissimilar Metal & Alloy Systems

Speaker: Prof. Dr. Lawrence. E. Murr

   Materials Research & Technology Institute
     The University of Texas at Elpaso, USA

Time: 14:00-15:30, (Fri.) 28, May, 2010

Venue:  Room 403, R&D building, IMR CAS

Welcome to attend!

Abstract

This review summarizes friction-stir welding (FSW) research at the University of Texas at El Paso (UTEP) over a period of a decade and a half, involving 18 different same materials FSW reference systems, and the FSW of 25 different, dissimilar materials systems. The FSW of dissimilar materials systems is distinguished from same materials systems FSW by the formation of complex, intercalated vortex and related flow patterns. These intercalated, lamellar-like patterns represent solid-state flow by dynamic recrystallization (DRX) which facilitates unrecrystallized, block flow in the DRX regime. Residual microindentation hardness or other hardness measured across the weld face provides comparative performance signatures for the same material FSW systems in contrast to the dissimilar FSW systems. Hardness fluctuations or complex spikes occurring in the dissimilar systems are skewed from the weld centerline and are shifted when the tool rotation direction changes or the advancing side is reversed.

(Please read the apendix)
文档附件
Lecture 3: A Review of UTEP Friction-Stir Welding Research on Dissimilar Metal & Alloy Systems.ppt
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