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<p>This research focused on exploring the role of titanium (Ti) on the tribological response of high-manganese (Mn) steel (HMS) alloys, subjected to low normal load conditions. Specifically, the wear behavior (in dry condition) of the baseline alloy and its composite with 0.15&#xa0;wt%Ti was studied as a function of the sliding distance (300, 600 and 900&#xa0;m). The results indicate that adding Ti to the baseline alloy resulted in the precipitation of a titanium carbide (TiC) phase, leading to a significant enhancement of the composite’s wear resistance. The composite had a 15%, 17% and 23% reduction in wear-induced volume loss for the 300&#xa0;m, 600&#xa0;m and 900&#xa0;m sliding distances, respectively. The observed improvement in wear resistance was seen to correlate to the microstructure grain refinement due to in situ TiC precipitation, dispersion strengthening and shielding of the alloy matrix by the TiC during abrasion. Hardness profiling in the vicinity of the wear tracks confirmed that both alloys underwent work hardening, and the work hardening rate increased with Ti addition and increasing sliding distance.</p>

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Enhancing wear performance: the role of in situ TiC formation in austenitic high-Mn steel under dry reciprocating wear conditions

  • 期刊论文

  • 发表日期：

    2025年6月13日

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  • Abhinav Karanam,
  • Lava Kumar Pillari,
  • Ashton Kennedy,
  • Delin Li,
  • Lukas Bichler

摘要

This research focused on exploring the role of titanium (Ti) on the tribological response of high-manganese (Mn) steel (HMS) alloys, subjected to low normal load conditions. Specifically, the wear behavior (in dry condition) of the baseline alloy and its composite with 0.15 wt%Ti was studied as a function of the sliding distance (300, 600 and 900 m). The results indicate that adding Ti to the baseline alloy resulted in the precipitation of a titanium carbide (TiC) phase, leading to a significant enhancement of the composite’s wear resistance. The composite had a 15%, 17% and 23% reduction in wear-induced volume loss for the 300 m, 600 m and 900 m sliding distances, respectively. The observed improvement in wear resistance was seen to correlate to the microstructure grain refinement due to in situ TiC precipitation, dispersion strengthening and shielding of the alloy matrix by the TiC during abrasion. Hardness profiling in the vicinity of the wear tracks confirmed that both alloys underwent work hardening, and the work hardening rate increased with Ti addition and increasing sliding distance.