Restricted accessResearch articleFirst published online 2017-12
Damage phenomena in lubricated rolling-sliding wear of a gas carburised 0.85%Mo low-alloyed sintered steel: Theoretical analysis and experimental verification
The resistance to surface and subsurface damage during lubricated rolling-sliding wear of a carburised low-alloy sintered steel and the effect of shot peening were investigated. The formation of both contact fatigue cracks and of brittle tensile cracks may be predicted by a theoretical model that was experimentally validated. Carburising is effective in increasing the resistance to contact fatigue, but pores in a hard and brittle matrix may act as pre-existing cracks. Shot peening increases the contact fatigue resistance since compressive residual stresses oppose the nucleation of surface cracks.
GovindarajanN, GnanamoorthyR.Rolling/sliding contact fatigue life prediction of sintered and sinterhardened steels. Wear. 2007;262:70–78. doi: 10.1016/j.wear.2006.03.053
2.
GovindarajanN, GnanamoorthyR.Study of damage mechanisms and failure analysis in sintered and hardened steels under rolling/sliding contact conditions. Mater Sci Eng A. 2007;445–446:259–268. doi: 10.1016/j.msea.2006.09.039
3.
BormettiE, DonzellaG, MazzùA.Surface and subsurface cracks in rolling contact fatigue of hardened components. J Tribol Trans. 2002;45:274–283. doi: 10.1080/10402000208982550
4.
SadeghiF, JalalahmadiB, SlackTS, A review of rolling contact fatigue. J Tribol T ASME. 2009;13:1–15.
5.
StraffeliniG, MolinariA, MarcupuscasT.Identification of rolling-sliding damage mechanisms in porous alloys. Metall Mater Trans A. 2000;31:3091–3099. doi: 10.1007/s11661-000-0088-0
6.
MuterllePV, StraffeliniG, MolinariA, Microstructural effects in wear of hardened sintered steels produced by diffusion bonded and prealloyed powders. Powd Metall. 2010;53:201–207. doi: 10.1179/174329009X409732
7.
BhattacharyyaA, SubhashG, ArakereN.Evolution of subsurface plastic zone due to rolling contact fatigue of M-50 NiL case hardened bearing steel. Int J Fatigue. 2014;59:102–113. doi: 10.1016/j.ijfatigue.2013.09.010
8.
StraffeliniG, MolinariA.Effect of hardness on rolling–sliding damage mechanisms in PM alloys. Powd Metall. 2001;44:344–350. doi: 10.1179/pom.2001.44.4.344
9.
StraffeliniG, MenapaceC, MolinariA.Interpretation of effect of matrix hardness on tensile and impact strength of sintered steels. Powd Metall. 2002;45(2):167–172. doi: 10.1179/003258902225002587
10.
SantulianaE, CristofoliniI, MolinariA, Effect of shot peening on the fatigue resistance of a Cr-Mo sintered steel. Adv Powd Metall Part Mater. 2010;6:41–48.
11.
MolinariA, SantulianaE, CristofoliniI, Surface modifications induced by shot peening and their effect on the plane bending fatigue strength of a Cr–Mo steel produced by powder metallurgy. Mater Sci Eng A. 2011;528:2904–2911. doi: 10.1016/j.msea.2010.12.072
12.
MetinözI, CristofoliniI, PahlW, Theoretical and experimental study of the contact fatigue behaviour of a Mo-Cu steel produced by powder metallurgy. Mater Sci Eng A. 2014;614:81–87. doi: 10.1016/j.msea.2014.07.009
13.
MolinariA, MenapaceC, SantulianaE, A semplified model for the impact resistance of porous sintered steels. Powder Metall Prog. 2011;11:12–20.
14.
ChawlaN, DengX.Microstructure and mechanical behavior of porous sintered steels. Mater Sc Eng A. 2005;390(1):98–112. doi: 10.1016/j.msea.2004.08.046
15.
CristofoliniI, CipolloniG, MolinariA.Macro- and micro-geometrical characteristics of surfaces of porous sintered parts. Adv Powd Metall Part Mater. 2012;2(7):47–56.
16.
PohlD.On the fatigue strength of sintered iron. Powder Met Int. 1969;1:26–28.
SmithJO, LiuCK.Stresses due to tangential and normal loads on an elastic solid with application to some contact stress problems. J Appl Mech. 1953;20:157–166.
