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Influence of precipitation hardening on the high-temperature sliding wear resistance of an aluminium alloyed iron-nickel base alloy

Krell, J. and Röttger, A. and Ziesing, U. and Theisen, W.

TRIBOLOGY INTERNATIONAL
Volume: 148 Pages:
DOI: 10.1016/j.triboint.2020.106342
Published: 2020

Abstract
This work investigates the effects of precipitation hardening on hot hardness and high-temperature sliding wear resistance of an iron-nickel base alloy. Three variants of a carbide rich alloy containing 0, 2 and 3 wt.-% aluminium were manufactured and aged for 24 h at 650, 700 and 750 °C. Hot hardness (20–800 °C) and sliding wear tests (600 °C) were conducted for each condition. The addition of aluminium has little effect on the type or volume content of the carbides. Ageing caused the precipitation of NiAl in the aluminium-containing alloys. The precipitation-hardened samples show higher hot hardness and better hot wear resistance. The lower wear loss can mainly be attributed to the improved support of the carbides by the precipitation strengthened matrix. © 2020

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