Effect of mating surface on the high temperature wear of 253 MA alloy

Abstract

The wear behaviour of metallic material is influenced by the friction force, which in turn, is governed by the hardness and oxidation kinetics of the mating surface. In view of this, present investigation is undertaken to find the influence of mating surface on the high temperature wear of 253 MA alloy. This alloy is developed for high temperature application. In this work 253 MA alloy is made to slide against two different types of counter face material, namely 100Cr6 steel and PM 1000 alloy, at five different temperatures. 100Cr6 steel gets soften with increase of temperature whereas PM 1000 alloy retains its strength even at high temperature. The friction coefficient and the thickness loss of 253 MA alloy is measured and compared against both variety of mating surfaces as function of temperatures. The morphology of the worn surfaces and the transverse section of the worn surfaces are examined under scanning electron microscope (SEM) to identify the material removal mechanisms. The results showed that the friction coefficient of test material against PM 1000 alloy is around 40% higher than the friction coefficient against 100Cr6 steel. The transverse section of the worn surface showed presence of a transfer layer, mechanically mixed layer and composite layer, which govern the wear behaviour particularly at elevated temperature. The chemical characteristics of these layers are dependent on the test temperature and the counter face material.

Processing Map and Hot Deformation Characteristics of 21Cr-11Ni-N-RE Lean Austenitic Heat-Resistant Steel

“…The material obtains its heat resistant properties by precise control of micro alloy additions, especially the rare earths (such as Ce, Y) combined with nitrogen. On these basis, economical 21Cr‐11Ni‐N‐RE can replace some heat resistant alloys, such as 309 S (13% Ni), 310S (20% Ni) stainless steels and even 330 (35% Ni) nickel alloy under certain conditions . During hot working of this material the process parameters, such as temperature and strain rate play a critical role in achieving acceptable surface finish and high grain size grade.…”

Use of wear mechanism map to engineer surfaces for enhanced wear resistance

“…The seizure occurs at 650N. Similarly Roy et al [81] noted reduction of friction coefficient of Cr 2 O 3 scale forming Cr 3 C 2 -25(Ni20Cr) coating, obtained by thermal spraying decreases with increase of test temperature. This coating was subjected to sliding wear at a load of 70 N and at sliding speed of 0.25 m/s.…”

“…The variation of friction coefficient as function of sliding distance for Cr 3 C 2 -25(Ni20Cr) coating at various test temperature[81].…”

Influence of Secondary Precipitations in Fe-Based MMCs on High Temperature Wear Behaviour

“…Beyond a critical loading energy, which depends on the material, the wear rate increases significantly [23]. At elevated temperatures, wear mechanisms can vary significantly compared to room temperature [26][27][28][29][30][31][32][33]. Identifying the pertinent wear mechanism is especially relevant when developing novel hardfacings [34][35][36][37].…”