Effect of Heat Treatment on the Microstructure and Mechanical Properties of Al-7Si-0.7Mg2.5Fe Processed by Laser Powder Bed Fusion

Author(s)

Pereira, Leandro ; Bomfim, Pamela ; Otani, Lucas ; Freitas, Brenda ; Botta, Walter ; Bolfarini, Claudemiro ; Kiminami, Claudio ; Gargarella, Piter

• Document type: Journal article
• Source: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 27, p. 12-pg., 2024-01-01.

Abstract

This paper investigates the effect of Fe contamination on the microstructure and mechanical properties of Al-7Si-0.7Mg-Fe2.5 alloy processed by Laser Powder Bed Fusion (LPBF) and heat treated in two different conditions: (1) Solution Heat Treatment (SHT) at 520 degrees C, followed by artificial ageing at 160 degrees C (T6), and (2) Direct Artificial Ageing of the as-printed material at 160 degrees C (DAA). characterization was carried out by tensile tests at room temperature. The formation of fine AlSiFe phases such as alpha-AlFeSi and (3-AlFeSi had no deleterious effect on the mechanical properties compared to previous studies for AlSiMg alloys without Fe. However, compared to the as-printed condition, the T6 heat treated sample decreased the ultimate tensile strain significantly, while the elongation to the fracture presented a slight improvement. (AU)

• FAPESP's process: 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys
• Grantee: Claudio Shyinti Kiminami
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/27031-4 - Effect of process parameters on the metallurgical characteristics of additive-manufactured alloys
• Grantee: Piter Gargarella
• Support Opportunities: Research Grants - Young Investigators Grants