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Fracture Toughness in an Extruded ZK60 Magnesium Alloy

Authors :
Hidetoshi Somekawa
Toshiji Mukai
Source :
MATERIALS TRANSACTIONS. 47:995-998
Publication Year :
2006
Publisher :
Japan Institute of Metals, 2006.

Abstract

Examination of fracture toughness has been performed a commercial Mg-Zn-Zr alloy, ZK60, with fine strengthening particles. The commercial alloy was extruded at 633 K, and then heat treated at specific conditions. The microstructures were equi-axed grains, and average grain size and precipitate size were 11.6 μm and 50-150 nm, respectively. The yield strength and elongation-to-failure were 225 MPa and 17.0%. The plane-strain fracture toughness, K IC , was estimated to be 20.6 MPam 1/2 in stretched zone analysis. From ductile fracture model, all the finer particles did not affect the void formation. The precipitates having a large diameter, more than 100 nm, were supposed to be the origin of void formation.

Details

ISSN :
13475320 and 13459678
Volume :
47
Database :
OpenAIRE
Journal :
MATERIALS TRANSACTIONS
Accession number :
edsair.doi...........41fb184c47ada4f658c06f4c48b14872
Full Text :
https://doi.org/10.2320/matertrans.47.995