Vliv strukturních vad na únavové chování hořčíkové slitiny AZ91 lité do písku a metodou squeeze casting

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F05%3A02114702" target="_blank" >RIV/68407700:21220/05:02114702 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Effect of Structure Defects on the Fatigue Behaviour of AZ91 Magnesium Alloy Prepared by Sand Casting and Squeeze Casting

Popis výsledku v původním jazyce

The microstructure, tensile and fatigue properties of the magnesium alloy AZ91 prepared by two different casting methods, i.e. by conventional sand casting and squeeze casting, were studied. In addition, the morphology of fracture surface of fatigue specimens was examined. The mechanisms of crack initiation and growth were studied, too. Correlations between the occurrence of structure defects and the deterioration of alloy properties were looked for. The tensile and fatigue properties of the squeeze-cast samples were found to be better than those of the sand-cast samples. The former samples possess a finer grain structure and, in contrast to the latter, rarely contain tiny pores. The mean fatigue life for 50% probability to failure of the sand-cast alloy is of 3.3x105 cycles at maximum stress of 90 MPa and 3.9x104 cycles at maximum stress of 100 MPa. The squeeze-cast alloy exhibits fatigue life of 3.3x105 cycles at the higher load, i.e. 100 MPa.

Název v anglickém jazyce

The Effect of Structure Defects on the Fatigue Behaviour of AZ91 Magnesium Alloy Prepared by Sand Casting and Squeeze Casting

Popis výsledku anglicky

The microstructure, tensile and fatigue properties of the magnesium alloy AZ91 prepared by two different casting methods, i.e. by conventional sand casting and squeeze casting, were studied. In addition, the morphology of fracture surface of fatigue specimens was examined. The mechanisms of crack initiation and growth were studied, too. Correlations between the occurrence of structure defects and the deterioration of alloy properties were looked for. The tensile and fatigue properties of the squeeze-cast samples were found to be better than those of the sand-cast samples. The former samples possess a finer grain structure and, in contrast to the latter, rarely contain tiny pores. The mean fatigue life for 50% probability to failure of the sand-cast alloy is of 3.3x105 cycles at maximum stress of 90 MPa and 3.9x104 cycles at maximum stress of 100 MPa. The squeeze-cast alloy exhibits fatigue life of 3.3x105 cycles at the higher load, i.e. 100 MPa.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2005

Kód důvěrnosti údajů

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

Název periodika

Kovové materiály

ISSN

0023-432X

e-ISSN

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Svazek periodika

43

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

17

Strana od-do

300-316

Kód UT WoS článku

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EID výsledku v databázi Scopus

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