Initiation of fatigue cracks in AZ91 Mg alloy processed by ECAP

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F14%3A00434745" target="_blank" >RIV/68081723:_____/14:00434745 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/1757-899X/63/1/012159" target="_blank" >http://dx.doi.org/10.1088/1757-899X/63/1/012159</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1757-899X/63/1/012159" target="_blank" >10.1088/1757-899X/63/1/012159</a>

Result language

angličtina

Original language name

Initiation of fatigue cracks in AZ91 Mg alloy processed by ECAP

Original language description

Mechanism of fatigue crack initiation was investigated in ultrafine-grained (UFG) magnesium alloy AZ91 processed by equal channel angular pressing (ECAP). Fatigue behaviour of UFG material was compared to the behaviour of material in an initial as-cast state. Focused ion beam technique (FIB) was applied to reveal the surface relief and early fatigue cracks. Two substantially different mechanisms of crack initiation were observed in UFG structure, which can be characterized as bimodal even after 6 ECAP passes by route Bc. The bimodality consists in a coexistence of very fine grained areas with higher content of Mg17Al12 particles and areas exhibiting somewhat larger grains and lower density of particles. The fatigue cracks which initiate in areas of larger grains are related to the cyclic slip bands; this initiation mechanism is similar to that observed in cast alloy. The second initiation mechanism is related to the grain boundary cracking which takes place predominantly in the fine gr

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JL - Fatigue and fracture mechanics

OECD FORD branch

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Project

<a href="/en/project/GAP108%2F10%2F2001" target="_blank" >GAP108/10/2001: Cyclic plastic deformation and fatigue performance of ultrafine-grained materials</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

NANOSPD 6

ISBN

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ISSN

1757-8981

e-ISSN

—

Number of pages

8

Pages from-to

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Publisher name

IOP Publishing Ltd

Place of publication

Bristol

Event location

Metz

Event date

Jun 30, 2014

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000347246200160