Development of 2024 AA-Yttrium composites by Spark Plasma Sintering

International Conference on Recent Advances in Materials & Manufacturing Technologies

Vidyasagar, C.H.S.^1 ; Karunakar, D.B.^2

Metallurgical and Materials Engineering Department, Indian Institute of Technology Roorkee, 247667, India^1

Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, 247667, India^2

关键词: 2024 AA;    Advanced processing techniques;    Field emission scanning electron microscopy;    Intermetallic formation;    Metallurgical characterization;    Microstructure characterization;    Microstructure properties;    Precipitation kinetics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/346/1/012050/pdf
DOI  :  10.1088/1757-899X/346/1/012050

来源: IOP

【 摘 要 】

The method of fabrication of MMNCs is quite a challenge, which includes advanced processing techniques like Spark Plasma Sintering (SPS), etc. The objective of the present work is to fabricate aluminium based MMNCs with the addition of small amounts of yttrium using Spark Plasma Sintering and to evaluate their mechanical and microstructure properties. Samples of 2024 AA with yttrium ranging from 0.1% to 0.5 wt% are fabricated by Spark Plasma Sintering (SPS). Hardness of the samples is determined using Vickers hardness testing machine. The metallurgical characterization of the samples is evaluated by Optical Microscopy (OM), Field Emission Scanning Electron Microscopy (FE-SEM). Unreinforced 2024 AA sample is also fabricated as a benchmark to compare its properties with those of the composite developed. It is found that the yttrium addition increases the above mentioned properties by altering the precipitation kinetics and intermetallic formation to some extent and then decreases gradually when yttrium wt% increases beyond 0.3 wt%. High density ( 99.75) is achieved in the samples and highest hardness achieved is 114 Hv, fabricated by spark plasma sintering and uniform distribution of yttrium is observed.