Length scale of the dendritic microstructure affecting tensile properties of Al-(Ag)-(Cu) alloys

Author(s)

Duarte, Roberto N. ^{[1, 2]} ; Faria, Jonas D. ^{[1, 2]} ; Brito, Crystopher ^[1] ; Verissimo, Nathalia C. ^[1] ; Cheung, Noe ^[1] ; Garcia, Amauri ^[1]

Affiliation

^[1] Univ Estadual Campinas, Dept Mfg & Mat Engn, BR-13083860 Sao Paulo - Brazil

^[2] Fed Inst Educ Sci & Technol Sao Paulo, BR-13872551 Sao Paulo - Brazil

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF MODERN PHYSICS B; v. 30, n. 3 JAN 30 2016.
• Web of Science Citations: 4

Abstract

The dependence of tensile properties on the length scale of the dendritic morphology of Al-Cu, Al-Ag and Al-Ag-Cu alloys is experimentally investigated. These alloys were directionally solidified (DS) under a wide range of cooling rates ((T)over dot), permitting extensive microstructural scales to be examined. Experimental growth laws are proposed relating the primary dendritic arm spacing, lambda(1) to (T)over dot. and tensile properties to lambda(1). It is shown that the most significant effect of the scale of lambda(1) on the tensile properties is that of the ternary alloy, which is attributed to the more homogeneous distribution of the eutectic mixture for smaller lambda(1) and by the combined reinforcement roles of the intermetallics present in the ternary eutectic: Al2Cu and nonequilibrium Ag3Al. (AU)

• FAPESP's process: 12/08494-0 - Thermal and Microstructural Parameters in the Transient Solidification of Al-Mg and Al-Mg-Si Alloys and Correlation with Mechanical and Corrosion Resistances
• Grantee: Crystopher Cardoso de Brito
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/23396-7 - Effects of solidification MicrostructureParameters of Aluminum-based multicomponent alloys (Al-Mg-Si; Al-Sn-Cu; Al-Zn-Mg) on the resistances to Corrosionand tribocorrosion degradation
• Grantee: Amauri Garcia
• Support Opportunities: Regular Research Grants