Effect of Heat Treatments on the Microstructure, Hardness and Corrosion Behavior of Nondendritic AlSi9Cu3(Fe) Cast Alloy

• Main Author: Nacer ZAZI
• Format: Article
• Language: English
• Published: Kaunas University of Technology 2013-09-01
• Series: Medžiagotyra
• Subjects: AlSi9Cu3 alloy; intermetallic phases; heat treatment; mechanical properties; corrosion
• Online Access: http://matsc.ktu.lt/index.php/MatSc/article/view/1397
• ISSN: 1392-1320; 2029-7289

<p><span>In this paper we studied the influence of heat treatments on properties of AlSi9Cu3</span><span>(Fe) nondendritic </span><span>cast</span><span> </span><span>alloy. Solution heat treatment, six hours at 520°C, while making the grains more spherical modifies corrosion morphology into intergranular corrosion and corrosion surrounding spherical particles in 3 % </span><span>NaCl</span><span> solution. Past solution treatment, quenching at 520°C after one hour with two weeks of natural aging transform the shape of grains into equiaxes form. Two weeks of natural aging and 30 minutes of aging at 150, 200, 250°C after solution treatment and quenching give birth to the "Chinese script" form of the Al₁₅(MnFe)₃Si intermetallic particles. The prolongation </span><span>of the duration period </span><span>of aging to one hour at 200°C is sufficient to transform the morphology of corrosion into located corrosion by pitting,</span><span> </span><span>and a </span><span>longer </span><span>aging cancels the "Chinese script" form. </span></p> <p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.19.3.1397">http://dx.doi.org/10.5755/j01.ms.19.3.1397</a></p>