TY - GEN
T1 - The influence of HPT on microstructure and wear resistance of Al-7wt%Si-2wt%Fe Alloy
AU - Wongsa-Ngam, Jittraporn
AU - Xu, Jie
AU - Phongphisutthinan, Chakkrist
AU - Langdon, Terence G.
N1 - Publisher Copyright:
© 2021 Trans Tech Publications Ltd, Switzerland.
PY - 2021
Y1 - 2021
N2 - An aluminum silicon-based alloy (Al-7wt%Si-2wt%Fe) was subjected to severe plastic deformation by the high-pressure torsion (HPT) method. This HPT processing was conducted at room temperature up to five revolutions under a pressure of 6.0 GPa and rotation speed of 1.0 rpm. Observations of microstructure evolution, especially intermetallic phases, was carried out by an optical microscope (OM) and a scanning electron microscope (SEM). It was found that the ironintermetallic particles decreased in size with numbers of turns. This is due to the large strain introduced during HPT processing which produced a degree of fragmentation of intermetallic phases which increased with the imposed strain. In addition, wear behaviors of the as-cast and samples deformed by HPT were also investigated using micro-tribometer UMT-2 (CETR Co., USA) following the ASTM G99-05 (2010) standard. The friction coefficient and wear volume loss were measured to evaluate the effect of imposed strain during HPT processing on wear resistance. It was found that the values of the average friction coefficient were slightly lower in deformed samples and the wear volume loss decreased with increasing numbers of turns.
AB - An aluminum silicon-based alloy (Al-7wt%Si-2wt%Fe) was subjected to severe plastic deformation by the high-pressure torsion (HPT) method. This HPT processing was conducted at room temperature up to five revolutions under a pressure of 6.0 GPa and rotation speed of 1.0 rpm. Observations of microstructure evolution, especially intermetallic phases, was carried out by an optical microscope (OM) and a scanning electron microscope (SEM). It was found that the ironintermetallic particles decreased in size with numbers of turns. This is due to the large strain introduced during HPT processing which produced a degree of fragmentation of intermetallic phases which increased with the imposed strain. In addition, wear behaviors of the as-cast and samples deformed by HPT were also investigated using micro-tribometer UMT-2 (CETR Co., USA) following the ASTM G99-05 (2010) standard. The friction coefficient and wear volume loss were measured to evaluate the effect of imposed strain during HPT processing on wear resistance. It was found that the values of the average friction coefficient were slightly lower in deformed samples and the wear volume loss decreased with increasing numbers of turns.
KW - Aluminum silicon-based alloy
KW - Friction coefficient
KW - High-pressure torsion
KW - Microstructure
KW - Wear resistance
UR - https://www.scopus.com/pages/publications/85100911619
U2 - 10.4028/www.scientific.net/MSF.1016.1618
DO - 10.4028/www.scientific.net/MSF.1016.1618
M3 - 会议稿件
AN - SCOPUS:85100911619
SN - 9783035736304
T3 - Materials Science Forum
SP - 1618
EP - 1623
BT - THERMEC 2021 - International Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications
A2 - Ionescu, Mihail
A2 - Sommitsch, Christof
A2 - Poletti, Cecilia
A2 - Kozeschnik, Ernst
A2 - Chandra, Tara
PB - Trans Tech Publications Ltd
T2 - International Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications, THERMEC 2021
Y2 - 10 May 2021 through 14 May 2021
ER -