期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2006.09.033
关键词
interface; casting; joining; magnesium alloy
The functionality of structural light alloy castings can be considerably improved by inserting into them upon moulding iron base local reinforcements. A necessary condition to obtain tight joints with good load transfer is that a sound metallurgical bond is formed at the insert/alloy interface. However, many physical-chemical factors play an important part in the mechanical behaviour of the joint. To acquire a better insight into this issue, bimetallic samples were prepared by immersing a mild steel bar (5 mm in diameter) in magnesium base Mg-Al alloy melts held at 650-750 degrees C in a graphite crucible (mean diameter 19 mm). Different processing conditions were used to vary the degree of chemical interaction at the insert/alloy interface. After melt solidification, the bimetallic samples were cut into slices (2-10 mm thick) and push out testing was performed on these slices. Attempts have been made to relate the main features of the load-displacement curves thus obtained with the nature and extent of the transition zones formed at the insert/alloy interface. (c) 2006 Elsevier B.V. All rights reserved.
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