Consolidation of commercial pure aluminum particles by hot ECAP

International Conference on Recent Advances in Materials, Mechanical and Civil Engineering

材料科学;机械制造;土木建筑工程

Gudimetla, Kondaiah^1 ; Ramesh Kumar, S.^2 ; Ravisankar, B.^1 ; Prasad Prathipati, R.^3 ; Kumaran, S.^1

Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli

Tamil Nadu

620015, India^1

School of Mechanical Engineering, Sastra University, Thanjavur

Tamil Nadu

613401, India^2

Department of Mechanical Engineering, PNC and Vijai Institute of Engineering and Technology, Phirangipuram, Repudi

Andhra Pradesh

522529, India^3

关键词: Commercial pure aluminum;    Commercial purity;    Consolidation process;    Elongation to fracture;    Fracture behavior;    Material microstructures;    Strength and ductilities;    Structural evolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/330/1/012031/pdf
DOI  :  10.1088/1757-899X/330/1/012031

来源: IOP

【 摘 要 】

In the current study undertaken, aluminum particles of commercial purity grade were compacted using hot ECAP. Investigation of the structural evolution and mechanical properties was done. Measurements of the densities of the samples was done for the purpose of evaluation the performance of the consolidation process. A tensile strength (UTS) of 98 MPa (after first pass) was obtained under tensile loads and the percent elongation to fracture was found to be 5.5%, which indicated good tensile strength and ductility as compared to the commercial pure Al powders consolidated by ambient temperature ECAP and other techniques. The relative density and Rockwell hardness (HRB) of compacts (after first pass) was 99% and 42 respectively. This is indisputable proof for establishing the compatibility of ECAP in the matter of producing bulk materials. Characterization of the material microstructure and fracture behavior was done through use of optical and scanning electron microscopy (SEM). The Al powders consolidated at 400°C through ECAP process, exhibited the best combination of yield strength and ductility and hence hot ECAP is suitable method for consolidation of micro powders.