科研之友
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摘要
Microstructure development during extrusion has been studied in a direct chill-cast Mg-6%Zn-0.5%Zr alloy at two extrusion ratios. Upon extrusion, the characteristic Zr-rich cores either recrystallize and form pockets of very fine grains or remain unrecrystallized and give rise to the so-called "soft stringers". Zn diffuses out of the Zn-rich rings at the grain boundaries and some of the metastable eutectic constituents undergo eutectoid decomposition.
- 出版日期2009-4
