Study of the Effect of Cooling Rate on Eutectic Modification in A356 Aluminium Alloys

Deni Ferdian (1, 2) , Jacques Lacaze (2) , Ibon Lizarralde (3) , Andrea Niklas (3) , Ana Isabel Fernandez-Calvo (3)

1 UI - University of Indonesia
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
3 Engineering and Foundry Department, Azterlan (Durango, Spain)

In this present work, an assessment of eutectic modification based on thermal analysis was performed on modified A356 alloy. The effect of various cooling rates which were achieved by means of casting samples with various moduli in sand and metallic moulds was investigated. Cooling curves recorded from thermocouples inserted in the centre of the samples showed characteristic undercooling and recalescence associated with (Al)-Si eutectic modification. The results showed that cooling rate has a role in observed modification level. Furthermore, differential thermal analysis was included to determine the eutectic melting temperature.

Mots clés: A356 alloy; Thermal analysis; Differential thermal analysis; Eutectic modification

Domaines: Génie chimique

Deni Ferdian, Jacques Lacaze, Ibon Lizarralde, Andrea Niklas, Ana Isabel Fernandez-Calvo. Study of the Effect of Cooling Rate on Eutectic Modification in A356 Aluminium Alloys. Materials Science Forum, 2013, vol. 765, pp. 130-134. ⟨10.4028/www.scientific.net/MSF.765.130⟩. ⟨hal-01174453⟩