Publication detail
Influence of heat treatment on mechanical properties and microstructure of AZ61 magnesium alloy
HORYNOVÁ, M. DOLEŽAL, P. GEJDOŠ, P. ZAPLETAL, J. JANOVÁ, D.
Czech title
Ovlivnění struktury a mechanických vlastností hořčíkové slitiny AZ61 tepelným zpracováním
English title
Influence of heat treatment on mechanical properties and microstructure of AZ61 magnesium alloy
Type
journal article - other
Language
en
Original abstract
The contribution is focussed on the assessment of the influence of heat treatment of magnesium alloy AZ61 on its mechanical properties and chemical and microstructural heterogeneity. The experimental material was manufactured by the squeeze casting method. The microstructure of the alloy in as cast state was composed of solid solution, intermetallic phase Mg17Al12, and minor Mn-based phases. The heat treatment applied to the alloy was solution annealing at a temperature of 380 C and with graded dwell time from 1 to 16 hours. Chemical etching was employed in order to estimate the micro-segregation of the elements in the matrix qualitatively and to discern the phases in the microstructure. Differences in etching between the central part and the periphery of crystalline units are apparent in the metallographic images documented by light microscopy. The quantitative assessment of chemical heterogeneity was done via mapping and local chemical microanalyses. The intensity of chemical micro-heterogeneity of each specimen was further expressed using effective distribution coefficients.
Czech abstract
Príspevek je zameren na posouzení vlivu tepelného zpracování horcíkové slitiny AZ61 na zmenu chemické a strukturní mikroheterogenity a mechanických vlastností. Horcíková slitina AZ61 byla vyrobena metodou squeeze casting. Mikrostruktura slitiny v litém stavu byla tvorena tuhým roztokem, intermetalickou fází Mg17Al12 a minoritními fázemi na bázi Al-Mn . Jako tepelné zpracování bylo pouzito rozpoustecí zíhání pri teplote 380 C a s odstupnovanou výdrzí 1 az 16 hodin. Pro kvalitativní odhad mikrosegregace prvku v matrici horcíkové slitiny a prítomných fází ve strukture bylo vyuzito leptání chemickými cinidly. Na snímcích ze svetelné mikroskopie byly zdokumentovány rozdíly heterogenity matrice ve stredu a na krajích krystalických utvaru v závislosti na intenzite naleptání. Kvantitativní hodnocení chemické mikroheterogenity bylo provádeno s vyuzitím map rozlození prvku (mapping) a lokální chemické mikroanalýzy. Intenzita chemické mikroheterogenity jednotlivých vzorku byla vyjádrena pomocí efektivních rozdelovacích koeficientu.
English abstract
The contribution is focussed on the assessment of the influence of heat treatment of magnesium alloy AZ61 on its mechanical properties and chemical and microstructural heterogeneity. The experimental material was manufactured by the squeeze casting method. The microstructure of the alloy in as cast state was composed of solid solution, intermetallic phase Mg17Al12, and minor Mn-based phases. The heat treatment applied to the alloy was solution annealing at a temperature of 380 C and with graded dwell time from 1 to 16 hours. Chemical etching was employed in order to estimate the micro-segregation of the elements in the matrix qualitatively and to discern the phases in the microstructure. Differences in etching between the central part and the periphery of crystalline units are apparent in the metallographic images documented by light microscopy. The quantitative assessment of chemical heterogeneity was done via mapping and local chemical microanalyses. The intensity of chemical micro-heterogeneity of each specimen was further expressed using effective distribution coefficients.
Keywords in Czech
AZ61, tepelné zpracování, mechanické vlastnosti
Keywords in English
AZ61, heat treatment, mechanical properties
RIV year
2010
Released
15.12.2010
ISSN
1210-0471
Journal
Transaction of the VŠB-Technical university of Ostrava, Mechanical series
Volume
LVI
Number
2
Pages from–to
73–82
Pages count
10
BIBTEX
@article{BUT50716,
author="Miroslava {Horynová} and Pavel {Doležal} and Pavel {Gejdoš} and Josef {Zapletal} and Drahomíra {Janová},
title="Influence of heat treatment on mechanical properties and microstructure of AZ61 magnesium alloy",
journal="Transaction of the VŠB-Technical university of Ostrava, Mechanical series",
year="2010",
volume="LVI",
number="2",
month="December",
pages="73--82",
issn="1210-0471"
}