Abstract
High temperatures generally affect materials in some form. In this regard, the capability to perform nanoscale measurements at elevated temperatures opens up new possibilities for investigating the temperature dependence of materials’ mechanical properties. Particularly, the responses of aluminum’s different mechanical properties to indentation at various temperatures have been studied experimentally. In this paper, aluminum response to different room temperatures was examined. The behaviors of a single crystal aluminum during loading and unloading were observed. Nanoindentation experiments on a single crystal aluminum (100) sample at temperatures of 265 K and 388 K were performed with different loading conditions. At the start of the first burst of the dislocation glide, which was indicated by a sudden increase in displacement with no increase in loading, evidence of plastic properties and softening effects on aluminum was identified. The ductile to brittle transition was observed at temperatures below 273 K. Generally, there was a significant increase in the penetration depth and a decrease in hardness, elastic modulus, and elastic recovery as the testing temperature increased.
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This paper was recommended for publication in revised form by Associate Editor Maenghyo Cho
Murugavel Rathinam received his Bachelor of of Engineering degree (B.E) in Mechanical Engineering from University of Madras, India in 1993. He then received his Master’s of Engineering degree (M.E) in Engineering Design from the Government College of Technology in 1997 and his Ph.D. from The Hong Kong Polytechnic University, Hong Kong, in 2004. He served as a Senior Engineer (R&D) in TATA Engineering and Locomotive Company. He is a recipient of the International Fellowship Award from the Hong Kong government. He was also awarded as excellent teacher. Dr. Rathinam is currently the Principal and a professor of Paavai Institutions, India. He has over 16 years of experience in the fields of teaching, research, and the industry. He has enormous international exposure in foreign universities in many countries, and he likewise serves as an editor and reviewer of international journals and books. Dr. Rathinam’s interests include nanotechnology, design, mechanics, materials, solid state electronics, innovative projects, and methodologies.
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Rathinam, M., Thillaigovindan, R. & Paramasivam, P. Nanoindentation of aluminum (100) at various temperatures. J Mech Sci Technol 23, 2652–2657 (2009). https://doi.org/10.1007/s12206-009-0718-4
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DOI: https://doi.org/10.1007/s12206-009-0718-4