Dependence of mechanical properties on porosity of AlSi7Mg0.3 alloy during gravity casting

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13420%2F19%3A43894885" target="_blank" >RIV/44555601:13420/19:43894885 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.tf.llu.lv/conference/proceedings2019/Papers/N076.pdf" target="_blank" >http://www.tf.llu.lv/conference/proceedings2019/Papers/N076.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22616/ERDev2019.18.N076" target="_blank" >10.22616/ERDev2019.18.N076</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dependence of mechanical properties on porosity of AlSi7Mg0.3 alloy during gravity casting

Popis výsledku v původním jazyce

In cast material, due to the technology and process used, the presence of defects in the cast material structure, such as porosity, inclusions and oxidative membranes, is inevitable. All these discrepancies have a negative effect on the resulting mechanical value of the cast material. Several works have shown that especially porosity in particular negatively degrades the fatigue properties, strength and ductility of the material. Since most fatigue failures begin at the surface of the material, surface roughness becomes an extremely important factor in determining the fatigue strength of the cast parts, and structural defects (porosity, inclusions, oxide membranes) near the surface have a decisive influence on the initiation of material breakage. The work is focused on the fractographic analysis of the fracture surface of AlSi7Mg0.3 casting alloy. Using the electron scanning microscope, the fracture area of the samples was analysed. Optical metallography identified structural components of castings just below the fracture surface as well as the course of the fracture line. An increased number of oxygen, carbon, chlorine and fluorine elements occurred on the surface of the samples. The occurrence of these elements most likely results in material breakage, which also confirms the results achieved by the static tensile test. On the basis of the obtained results from the performed analyses, mechanisms of breaking of alloyed material of Al-Si type alloys were determined.

Název v anglickém jazyce

Dependence of mechanical properties on porosity of AlSi7Mg0.3 alloy during gravity casting

Popis výsledku anglicky

In cast material, due to the technology and process used, the presence of defects in the cast material structure, such as porosity, inclusions and oxidative membranes, is inevitable. All these discrepancies have a negative effect on the resulting mechanical value of the cast material. Several works have shown that especially porosity in particular negatively degrades the fatigue properties, strength and ductility of the material. Since most fatigue failures begin at the surface of the material, surface roughness becomes an extremely important factor in determining the fatigue strength of the cast parts, and structural defects (porosity, inclusions, oxide membranes) near the surface have a decisive influence on the initiation of material breakage. The work is focused on the fractographic analysis of the fracture surface of AlSi7Mg0.3 casting alloy. Using the electron scanning microscope, the fracture area of the samples was analysed. Optical metallography identified structural components of castings just below the fracture surface as well as the course of the fracture line. An increased number of oxygen, carbon, chlorine and fluorine elements occurred on the surface of the samples. The occurrence of these elements most likely results in material breakage, which also confirms the results achieved by the static tensile test. On the basis of the obtained results from the performed analyses, mechanisms of breaking of alloyed material of Al-Si type alloys were determined.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Engineering for Rural Development

ISSN

1691-3043

e-ISSN

—

Svazek periodika

2019

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

LV - Lotyšská republika

Počet stran výsledku

6

Strana od-do

1001-1006

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85067117481