Title

Nanoindentation and wear properties of Ti and Ti-TiB composite materials produced by selective laser melting

Document Type

Journal Article

Publisher

Elsevier

School

School of Engineering

Comments

Originally published as: Attar, H., Ehtemam-Haghighi, S., Kent, D., Okulov, I. V., Wendrock, H., Bӧnisch, M., ... & Dargusch, M. S. (2017). Nanoindentation and wear properties of Ti and Ti-TiB composite materials produced by selective laser melting. Materials Science and Engineering: A, 688, 20-26. Original article available here

Abstract

Ti and Ti-TiB composite materials were produced by selective laser melting (SLM). Ti showed an α΄ microstructure, whereas the Ti-TiB composite revealed a distribution of needle-like TiB particles across an α-Ti matrix. Hardness (H) and reduced elastic modulus (Er) were investigated by nanoindentation using loads of 2, 5 and 10 mN. The results showed higher H and Er values for the Ti-TiB than Ti due to the hardening and stiffening effects of the TiB reinforcements. On increasing the nanoindentation load, H and Er were decreased. Comparison of the nanoindentation results with those derived from conventional hardness and compression tests indicated that 5 mN is the most suitable nanoindentation load to assess the elastic modulus and hardness properties. The wear resistance of the samples was related to their corresponding H/Er and H3/Er2 ratios obtained by nanoindentation. These investigations showed that there is a high degree of consistency between the characterization using nanoindentation and the wear evaluation from conventional wear tests.

DOI

10.1016/j.msea.2017.01.096

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