MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Effects of Stress Triaxiality on Damage Evolution from Pre-Existing Hydrogen Pores in Aluminum Alloy
Hiroyuki TodaHideki TsurutaKeitaro HorikawaKentaro UesugiAkihisa TakeuchiYoshio SuzukiMasakazu Kobayashi
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2014 Volume 55 Issue 2 Pages 383-386

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Abstract

It has recently been reported that aluminum alloy ductile fracture is dominated by micropore growth, whereas the particle fracture mechanism operates incidentally. The effects of stress triaxiality in front of a notch or crack were here investigated by employing microtomography observations. A fractional dimple pattern area originating in micropores increased with the increase in stress triaxiality on fracture surfaces. This implies that the effects of micropores on mechanical properties are more pronounced in notched and cracked materials.

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© 2014 The Japan Institute of Light Metals
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