Mechanical behavior of bulk ultra-fine-grained Zn-Al die-casting alloys

作者：Gobien J M^*; Scattergood R O; Goodwin F E; Koch C C

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2009, 518(1-2): 84-88.

DOI：10.1016/j.msea.2009.04.023

• Zinc
• Aluminum
• Ball milling
• Hall-Petch
• Ultra-fine grain
• Nano-crystalline

The mechanical properties of Zn-4wt% Al casting alloys are compared after various processing methods including sand casting, die-casting, and high energy cryogenic ball milling. For the cast structures there is an increase in strength when transitioning from a coarse sand casting microstructure to a finer grained thin-section die-casting. This is in contrast to a decrease in strength and increase in ductility seen when the cast structure is broken up by high energy cryogenic ball milling to a uniform ultra-fine grain scale. The ultra-fine grained structures produced by cryogenic ball milling subjected to a range of isothermal heat treatments follow the Hall-Petch behavior over the range of grain sizes studied. Published by Elsevier B.V.

• 出版日期2009-8-25