Strengthening of mechanical and tribological properties in CrFeCuMnNi high entropy alloy through dispersion of TiO2 reinforcement via powder metallurgy processes

IF 44 1区医学 Q1 ENDOCRINOLOGY & METABOLISM

The Lancet Diabetes & Endocrinology Pub Date : 2024-10-11 DOI:10.1016/j.ceramint.2024.10.155

Cheenepalli Nagarjuna, Sheetal Kumar Dewangan, K. Raja Rao, Man Mohan, Hansung Lee, Eunhyo Song, Byungmin Ahn

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引用次数: 0

Abstract

The present study reports the effect of TiO₂ reinforcement on the phase, microstructure, mechanical and tribological properties of CrFeCuMnNi/TiO₂ high entropy alloy composites (HEACs) processed by powder metallurgy. The results reveal the formation of single-phase face-centered cubic (FCC) structure after 30 h of milling in the original HEA, while TiO₂ peaks in the HEACs indicate uniform distribution. After sintering, multiple phases including FCC, Cr-rich, Cr₂O₃ were observed. The hardness of HEAs increased from 330±10 to 440±10 HV and compressive yield strength increased from 480 to 760 MPa while scarifying the strain from 43.5 to 21 % with TiO₂ content. The addition of TiO₂ content slightly reduces the coefficient of friction and specific wear rate decreased by 45.16 % due to increased hardness and formation of stable oxide layer on the worn surface inhibits plastic deformation. The addition of TiO₂ reduces the dominance of abrasive and adhesive wear and enhances the strength of HEACs.

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通过粉末冶金工艺分散 TiO2 增强剂强化 CrFeCuMnNi 高熵合金的机械和摩擦学性能

本研究报告了 TiO2 增强对通过粉末冶金法加工的 CrFeCuMnNi/TiO2 高熵合金复合材料（HEACs）的相、微结构、力学和摩擦学性能的影响。结果表明，原始 HEA 经过 30 小时的研磨后形成了单相面心立方（FCC）结构，而 HEAC 中的 TiO2 峰则呈均匀分布。烧结后观察到多相，包括 FCC、富铬和 Cr2O3。随着 TiO2 含量的增加，HEA 的硬度从 330±10 HV 增加到 440±10 HV，抗压屈服强度从 480 MPa 增加到 760 MPa，同时应变从 43.5% 减少到 21%。加入 TiO2 后，摩擦系数略有降低，比磨损率降低了 45.16%，这是由于硬度增加以及在磨损表面形成稳定的氧化层抑制了塑性变形。二氧化钛的添加降低了磨料磨损和粘着磨损的主导地位，增强了 HEAC 的强度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The Lancet Diabetes & Endocrinology ENDOCRINOLOGY & METABOLISM-

CiteScore

61.50

自引率

1.60%

发文量

371

期刊介绍： The Lancet Diabetes & Endocrinology, an independent journal with a global perspective and strong clinical focus, features original clinical research, expert reviews, news, and opinion pieces in each monthly issue. Covering topics like diabetes, obesity, nutrition, and more, the journal provides insights into clinical advances and practice-changing research worldwide. It welcomes original research advocating change or shedding light on clinical practice, as well as informative reviews on related topics, especially those with global health importance and relevance to low-income and middle-income countries. The journal publishes various content types, including Articles, Reviews, Comments, Correspondence, Health Policy, and Personal Views, along with Series and Commissions aiming to drive positive change in clinical practice and health policy in diabetes and endocrinology.