Type

Journal Article

Authors

Dermot Brabazon
Sumsun Naher
Inam Ul Ahad
Jared Houghtaling
Andre Mussatto
Shadi Karazi
Eanna McCarthy
Harshaan Singh
Sohan Parab
Robert Groarke
and 2 others

Subjects

Engineering

Topics
particle size parameters different size grain structure powder metallurgy mechanical properties synthesis strain rates

Effect of powder metallurgy synthesis parameters for pure aluminium on resultant mechanical properties (2018)

Abstract In this work, pure aluminium powders of different average particle size were compacted, sintered into discs and tested for mechanical strength at different strain rates. The effects of average particle size (15, 19, and 35 µm), sintering rate (5 and 20 °C/min) and sample indentation test speed (0.5, 0.7, and 1.0 mm/min) were examined. A compaction pressure of 332 MPa with a holding time of six minutes was used to produce the green compacted discs. The consolidated green specimens were sintered with a holding time of 4 hours, a temperature of 600 °C in an argon atmosphere. The resulting sintered samples contained higher than 85% density. The mechanical properties and microstructure were characterized using indentation strength measurement tests and SEM analysis respectively. After sintering, the aluminium grain structure was observed to be of uniform size within the fractured samples. The indentation test measurements showed that for the same sintering rate, the 35 µm powder particle size provided the highest radial and tangential strength while the 15 µm powder provided the lowest strengths. Another important finding from this work was the increase in sintered sample strength which was achieved using the lower sinter heating rate, 5°C/min. This resulted in a tangential stress value of 365 MPa which was significantly higher than achieved, 244 MPa, using the faster sintering heating rate, 20 °C/min.
Collections Ireland -> Dublin City University -> Publication Type = Article
Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Engineering and Computing: School of Mechanical and Manufacturing Engineering
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres: I-Form

Full list of authors on original publication

Dermot Brabazon, Sumsun Naher, Inam Ul Ahad, Jared Houghtaling, Andre Mussatto, Shadi Karazi, Eanna McCarthy, Harshaan Singh, Sohan Parab, Robert Groarke and 2 others

Experts in our system

1
Dermot Brabazon
Dublin City University
Total Publications: 162
 
2
Sumsun Naher
Dublin City University
Total Publications: 56
 
3
Inam Ul Ahad
Dublin City University
Total Publications: 6
 
4
Shadi Karazi
Dublin City University
Total Publications: 20
 
5
Eanna McCarthy
Dublin City University
Total Publications: 5
 
6
Robert Groarke
Dublin City University
Total Publications: 11