Effect of slid-roll ratio on the contact fatigue behavior of sintered and hardened steels

2004 ◽  
Vol 4 (2) ◽  
pp. 78-83 ◽  
Author(s):  
R. Gnanamoorthy ◽  
N. Govindaraian ◽  
Y. Mutoh
Keyword(s):  
Fatigue Behavior ◽  
Contact Fatigue ◽  
Hardened Steels

Computation of Sliding Friction and Ratcheting Strain of Sintered and Hardened Steels Under Contact Fatigue Conditions

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
N. Govindarajan ◽  
R. Gnanamoorthy
Keyword(s):  
Powder Metallurgy ◽  
Friction Coefficient ◽  
Sliding Friction ◽  
Fatigue Behavior ◽  
Contact Fatigue ◽  
Sliding Contact ◽  
Particle Analysis ◽  
Hardened Steels ◽  
Ratcheting Strain ◽  
Sliding Friction Coefficient

Fatigue properties of powder metallurgy parts are affected mainly by the porosity fraction. Even though it has inferior mechanical and physical properties over the conventional materials, the application of powder metallurgy products in automotive fields is seen in recent trends. The rolling-sliding contact fatigue behavior of sintered and hardened steels has been investigated by performing experiments that represent practical sliding friction coefficient component prevailing in the medium- and heavy-duty bearings and gears. Introduction of sliding friction coefficient changes the typical failure pattern and wear rate of sintered and hardened steels. The sliding friction has been computed from available models and compared with the experimental data. The ratcheting strain has also been predicted for sintered and hardened steels for various contact pressures and sliding friction coefficients. The maximum value of this strain is responsible for surface crack initiation. The wear particle analysis is carried out for the sintered and hardened steels under rolling-sliding contact fatigue conditions. The ferrogram slides for pore free steel under the rolling-sliding contact fatigue conditions are also prepared to study the effect of porosity in wear mechanism. The characteristics of wear morphology and the size, shape, and concentration of worn particles for sintered and hardened steels are also analyzed for various rolling-sliding contact fatigue conditions.

Rolling contact fatigue behavior of sintered and hardened steels

2002 ◽  
Vol 2 (4) ◽  
pp. 71-75 ◽  
Author(s):  
R. Gnanamoorthy ◽  
N. Rajiv ◽  
K. Gopinath ◽  
Y. Miyahsita ◽  
Y. Mutoh
Keyword(s):  
Fatigue Behavior ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Hardened Steels

Effect of ultrasonic surface rolling on microstructure and rolling contact fatigue behavior of 17Cr2Ni2MoVNb steel

2019 ◽  
Vol 366 ◽  
pp. 321-330 ◽  
Author(s):  
Ya-Long Zhang ◽  
Fu-Qiang Lai ◽  
Sheng-Guan Qu ◽  
Hai-Peng Liu ◽  
Dong-Sheng Jia ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact

scholarly journals Contact Fatigue Strength of Austempered Ductile Iron (ADI) in Gear Applications

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1147
Author(s):  
Fabian Goergen ◽  
Dieter Mevissen ◽  
Stefano Masaggia ◽  
Enrico Veneri ◽  
Jens Brimmers ◽  
...  
Keyword(s):  
Ductile Iron ◽  
Fatigue Behavior ◽  
Contact Fatigue ◽  
Austempered Ductile Iron ◽  
Specific Point ◽  
Iron And Steel ◽  
Contact Fatigue Strength ◽  
Steel Castings ◽  
Short Time ◽  
Internal Gear

Austempered Ductile Iron (ADI) is widely implemented to achieve lightweight and optimized components in power transmissions (e.g., internal gear in planetary stages), by substituting steel castings or a combination of Ductile Iron and steel-assembled structures. In this paper, the contact fatigue of two ADI grades (ADI J/S900-8; ADI J/S1200-3) is investigated by disk-on-disk tests. The disk-on-disk contact is an analogy model of the tooth contact and represents the tribological conditions at a specific point on the path of contact. The experimental results cover the endurance limit as well as the short time fatigue behavior for both ADI variants. In addition, the pitting characteristics and microstructural changes are analyzed in order to get a further understanding of the fatigue behavior of ADI.

The Analysis of Contact Fatigue Behavior in Ni-Base Single Crystal Superalloy Turbine Blade Rabbet

2014 ◽  
Vol 633-634 ◽  
pp. 1104-1110
Author(s):  
Guo Cai Zhou ◽  
Hai Qing Pei
Keyword(s):  
Shear Stress ◽  
Single Crystal ◽  
Turbine Blade ◽  
Contact Area ◽  
Fatigue Behavior ◽  
Stress Gradient ◽  
Contact Fatigue ◽  
Tooth Contact ◽  
Rate Dependent ◽  
Single Crystal Turbine Blade

Based on the dislocation pile-up theory and the crystal plastic theory, a rate-dependent crystallographic plastic finite element method (FEM) was used to analyze the stress distribution in the contact zone of single crystal turbine blade rabbet. The FEM results show that the maximum stress and the maximum resolved shear stress location are in the upper edge of the first tooth contact area of the rabbet. The surface crack initiates in the edge and grows as the zigzag wave. The deflected angle of the plane defined by maximum resolved shear stress gradient direction and the upper edge of the first tooth contact area of the rabbet with respect to the Z axis is 35°. The fracture occurs along the {-1-11} plane. Fracture behavior of rabbet/groove modeling specimens made of nickel-based single crystal superalloys was studied by corresponding contact fatigue experiments. The initial place and developing direction of the fatigue crack observed from experiments are found to be in good agreement with the predicted results based FEM.

Wear and Surface Residual Stress Evolution on Twin-Disc Tests of Rail/Wheel Steels

2013 ◽  
Vol 768-769 ◽  
pp. 707-713
Author(s):  
António Castanhola Batista ◽  
Daniel F.C. Peixoto ◽  
Joao P. Nobre ◽  
Luís Coelho ◽  
Diogo Mesquita Ramos ◽  
...  
Keyword(s):  
Residual Stress ◽  
Fatigue Behavior ◽  
Contact Fatigue ◽  
Major Influence ◽  
Stress Evolution ◽  
X Ray Diffraction ◽  
Surface Layers ◽  
Surface Residual Stress ◽  
X Ray ◽  
Initiation And Propagation

Twin disc tribological tests were performed in wheel and rail materials, with specimens taken from a Spanish AVE train wheel and a UIC60 rail, in a program intended to characterize their contact fatigue behavior. The X-ray diffraction technique was used to characterize the residual stress distribution at the initial and damaged stages, as well as in intermediate stages, since existing residual stresses in the surface layers of the railways steels and its evolution during contact loading can have a major influence on crack initiation and propagation.

Rolling contact fatigue behavior of Ti/TiN coated ADI by cathodic arc deposition

2017 ◽  
Vol 43 (5) ◽  
pp. 4263-4271 ◽  
Author(s):  
Diego Alejandro Colombo ◽  
Juan Miguel Massone ◽  
María Dolores Echeverría ◽  
Adriana Beatriz Márquez
Keyword(s):  
Fatigue Behavior ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Cathodic Arc Deposition ◽  
Cathodic Arc ◽  
Arc Deposition

K-0710 Effect of Heal Treatment on Contact Fatigue Behavior of Sintered Alloys

2001 ◽  
Vol I.01.1 (0) ◽  
pp. 309-310
Author(s):  
Makoto HORIKOSHI ◽  
Yukio MIYASHITA ◽  
Jin-Quan XU ◽  
Yoshiharu MUTOH ◽  
Hitoshi FUKUHARA
Keyword(s):  
Fatigue Behavior ◽  
Contact Fatigue ◽  
Sintered Alloys
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