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COST 507 - Repositório Aberto da Universidade do Porto

COST 507 - Repositório Aberto da Universidade do Porto

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2. Experimental Procedures<br />

Four alloys have been prepared for the present study. Alloy A357 used as<br />

reference, alloy A357 with Cu addition, designated as A357+Cu, alloy<br />

A357+CU with Ag addition designated as A357+Cu+Ag and finally alloy<br />

A357+CU with Sm addition designated as A357+Cu+Sm. The chemical<br />

compositions of the alloys are given in Table 1. Conventional precision casting<br />

of the four alloys was performed by ALPHA Spain in the form of bars with a<br />

length of 20 cm and with 2.3x2.3 cm 2 cross section. The bars received a<br />

solution heat treatment as follows :<br />

A357 : 538° C/22h, water quench (

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