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ABSTRACT
A study on dry sliding wear investigated four alloys: fully austenitized ADI (F-ADI), intercritically austenitized austempered ductile iron (I-ADI), hardened and tempered Boron steel (B-Steel), and hardened and tempered AISI 1045 steel (EN-Steel). Despite their similar hardness levels, these alloys differ in composition and microstructure. Testing was conducted using a Ball-On-Disc setup (ASTM G99-05) with a chrome steel ball, maintaining a constant sliding speed of 0.6 m/s and applying loads between 20 and 80 N. This study aimed to understand the influence of yield strength (σy), strain hardening coefficient (n), and microstructure on sliding wear under uniform hardness conditions. The findings indicated a strong connection between sliding wear resistance, strain hardening coefficient, toughness, and yield strength. Wear mechanisms varied slightly among materials; F-ADI and I-ADI exhibited deformed layers with increased hardness and oxide formation, while B-Steel and EN-Steel showed micro-cutting and micro-ploughing. F-ADI's high-carbon austenite film and I-ADI's proeutectoid ferrite contributed to improved wear performance. The hardness of the deformation layer on FADI and I-ADI's worn surfaces highlighted the benefits of strain hardening in dry sliding wear.
GRAPHICAL ABSTRACT
Disclosure statement
No potential conflict of interest was reported by the author(s).
Author contributions
All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Anoop Gupta, Manpreet Singh, Sandan Kuamr Sharma, and Uma Batra. The first draft of the manuscript was written by Sandan Kumar Sharma and Uma Batra and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript. Anoop Gupta: Testing, Formal analysis, writing first draft. Manpreet Singh: DI and ADI sample preparation, heat treatment of samples. Uma Batra: Resources, Conceptualisation and Investigation, Supervision, Validation, Writing – review and editing. Sandan Kumar Sharma: Supervision, Conceptualisation and Investigation, Methodology, Validation, SEM imaging and analysis of SEM images of worn surfaces and debris, Writing – review and editing.