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

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.

Document Type

Journal Article

Date of Publication

2017

Publication Title

Materials Science and Engineering: A

Publisher

Elsevier

School

School of Engineering

RAS ID

27026

Comments

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. https://doi.org/10.1016/j.msea.2017.01.096

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Link to publisher version (DOI)

10.1016/j.msea.2017.01.096