Journal
MATERIALS
Volume 14, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/ma14123168
Keywords
microstructure evolution; stretch formability; Erichsen cupping test; multiple-pass friction stir processing
Categories
Funding
- Natural Science Foundation of Guangdong Universities for Innovative Team [2020KCXTD043]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
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The stretch formability of M-FSP AZ61 magnesium alloy was significantly improved due to grain refinement and the presence of extension twinning, leading to the highest Erichsen index of 3.7 mm at a punching speed of 0.1 mm/min.
The stretch formability behavior of an AZ61 magnesium alloy plate produced by multi-pass friction stir processing (M-FSP) was investigated, with the applied load vs. displacement curves recorded during Erichsen cupping tests at different punching speeds at room temperature. The stretch formability of M-FSP AZ61 magnesium alloy was significantly enhanced, compared with that of its cast counterpart. The highest Erichsen index of 3.7 mm was obtained at a punching speed of 0.1 mm/min. The improved stretch formability was mainly attributed to the grain refinement stemming from the M-FSP and the presence of extension twinning to accommodate deformation during Erichsen cupping testing.
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