Fabrication of Az31/CNT surface nano-composite by double-pass friction stir processing

Title
Fabrication of Az31/CNT surface nano-composite by double-pass friction stir processing
Authors
정우상김재연황정우김혜영이승미변재원
Keywords
Surface Modification; Double-pass Friction Stir Processing; AZ31; Composite; CNT
Issue Date
2017-06
Publisher
Archives of metallurgy and materials
Citation
VOL 62, NO 2B-1042
Abstract
Double-pass Friction Stir Processing (FSP) was applied to fabricate an AZ31/CNT nano-composite for surface hardening of lightweight structural components. The effects of double-pass FSP as well as groove depth (i.e., volume fraction of CNT) on the CNT distribution, dynamically recrystallized grain size, and resulting microhardness were studied. Double-pass FSP was performed for the CNT-filled plate-type specimen with different groove depths of 2, 3, and 4 mm. By applying double-pass FSP, the average size of CNT clusters decreased, implying a more homogeneous distribution. Compared with the FSPed specimen without CNT, grain size was refined from 19 μm to 3 μm and microhardness increased from 52 Hv to 83 Hv (i.e., 71% increase). Keywords: Surface Modification, Double-pass Friction Stir Processing, AZ31, Composite, CNT
URI
http://pubs.kist.re.kr/handle/201004/66003
ISSN
1733-3490
Appears in Collections:
KIST Publication > Article
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