US9389155B1 US14/097,509 US201314097509A US9389155B1 US 9389155 B1 US9389155 B1 US 9389155B1 US 201314097509 A US201314097509 A US 201314097509A US 9389155 B1 US9389155 B1 US 9389155B1 Authority US United States Prior art keywords mounting test specimen gauge specimen exemplary Prior art date 2013-03-12 Legal status (The legal status is an assumption and isTitle Maitre technologue ISET DjerbaLocation Djerba Midoun,M Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#233;denine Governorate,TunisiaLOW CYCLE AND HIGH CYCLE FATIGUE STRENGTH OFcycle fatigue in near surface layer at the interface between basic metal and nitrided layer.Since the initiation of surface cracks in nitrided layer is fast,the durability of nitrided specimens at low cycle fatigue often is lower than durability of specimens not processed by nitriding .In the work  itThermal cracking behavior of multi-layer LAFADmulating,resulting in low cycle fatigue cracking.During previous evaluation campaigns at The Ohio State University,multi-layer and duplex coatings,depos-ited at Universal Energy Systems (UES ) on H-13 steel substrate were observed to provide better corrosion-resistance as compared to commercial coatings and single layer coatings w3,4x.
ness of this layer for the low cycle fatigue performance.This high concentration was considered as a defect in some cases and called High Interstitial Defect (HID) .Ti6Al4V subjected to the solution-based and overaged treatments with bimodal microstructure is typically used for engine blade and disk applications [1,27].Study of the Effect of Gas Nitriding Time on Prior studies have noted that gas nitriding has a considerable effect for wear resistance.The aim of this paper is to study the influence of gas nitriding time (12,24,36 and 48 h) in the wear behaviour of 42CrMo4 steel.It has been assessed by micro hardness,pin-on-disc tribosystem,and SEM through the nitrided layer for each nitriding time.Structure and Properties of the Glow Discharge Nitrided The low-cycle fatigue tests (which,in view of the differences between the properties of the untreated material and the nitrided layers,can be classified among the most severe mechanical tests) either,indicated no essential differences in the fatigue properties of the samples subjected to the surface treatments conducted under various conditions.
Brni et al.(2016) studied some mechanical,creep and fatigue properties of low alloy 42CrMo4 steel at different temperatures.Two dimensional time-dependent creep analysis of a thickwalled FG Short crack fatigue threshold of a nitrided and shot To assess the fatigue behaviour of a nitrided and shot penned 42CrMo4 UNI EN 10083 steel,with superficial defects of different size obtained by two different methods,rotating bending tests were performed.To help understanding and justifying the results,residual stresses and FWHM measurements were executed also on only nitrided samples.Research Publications of Prof - IIT Madras48) Ganesh Sundara Raman,S.and Kitsunai,Y.,Fatigue Crack Growth Behaviour of A533B Steel in Pressurized Water at 288 0 C and 28 0 C,Engg Failure Analysis,11,293-303,2004.49) Ganesh Sundara Raman,S.and Radhakrishnan,V.M.,Low Cycle Fatigue Life Dependence on Test Mode.J Mater Engg Performance,13,88-92,2004.
Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#0183;Translate this pageLow Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4 Steel International Journal of Materials Science and Applications Volume 6,Issue 1 ,January 2017,Pages:18-27 4 2017Proceedings21 Revised R Kreethi NCPCM 2014plasma nitrided and nitrocarburized 42CrMo4 steel D Kusmic and D Van Thanh-Recent citations It is well established that the conventional low cycle fatigue life of engineering behaviour of 42CrMo4 steel as per the knowledge of current investigation.Previous123456Next
F.Ritz,T.Beck,Influence of mean stress and notches on the very high cycle fatigue behaviour and crack initiation of a lowpressure steam turbine steel,Fatigue Fracture of Engineering Materials Structures,10.1111/ffe.12666,40,11,(1762-1771),(2017).On the Fatigue Crack Growth Behavior of a Nitrided and In this paper the fatigue crack growth properties of a nitrided shot-peened steel is dealt with different peening intensities were considered and the resulting residual stresses measured by means of an X-ray diffractometer.Rotating bending fatigue tests were executed on specimens with a blind micro-hole,acting as a pre-existent crack.The results allowed determining the threshold of Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4 This superficial hardening does not modify the tensile mechanical characteristics of 42CrMo4 steel but renders it more sensitive to overload in fatigue.As a result,a 0.7% total deformation imposed corresponding to a loading level of 850MPa,constitutes the limit of gain in fatigue obtained by the ion nitriding considered.
Jan 01,2017 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#0183;In term of the number of cycles at rupture,a nitrided layer of 42CrMo4 (E NR= 300 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#181;m,HV max= 1090) loses all its performances in fatigue when the rates of total deformation are equal to or higher than 0.7%.Influence of Indentation on the Fatigue Strength of Recently,the authors of two papers considered the influence of small artificial surface defects on the fatigue behavior of nitrided and shot-peened steel; however,they did not consider the effect of the compound layer .Nitriding causes an appreciable reduction of the impact fatigue strength and the Charpy impact resistance .The compound IOP Conference Series Materials Science andplasma nitriding process in the device [5,6].The formed oxide layer is able to cover the micropores and improves the corrosion resistance of nitrided steel [7-10].This paper is focused on evaluation of wear and corrosion resistance of plasma nitrided and nitrocarburized 42CrMo4 (AISI 4137/4140) steel and compared to tempered one.
This contribution deals with the life prediction of the virgin and nitrided hot-working tool steels X38CrMoV5 (AISI H11,47 HRC) under Transient Thermomechanical (TMF) loading.Isothermal Low Cycle Fatigue (LCF) and thermomechanical (TMF) behaviour are investigated at different temperatures and various frequencies.It is shown that nitruration can enhance the fatigue life only when the strain Fatigue life of carburized steel specimens under pushcarburizing can lead to about 25% increase in the fatigue resistance in the high cycle region (over 105 cycles).On the contrary,in the case of low cycle fatigue often has a negative effect on the service life.I.INTRODUCTION METAL fatigue is a significant problem because it can occur due to repeated loads below the static yield strength.Fatigue Limit of Custom 465 with Surface Strengthening The nitriding or shot peening surface strengthening can significantly improve the fatigue limit of Custom 465,wherein the fatigue limits of nitrided and shot peened surface strengthened specimens are 50.09% and 50.66% higher than that of the un-surface strengthened specimens,respectively.
Low Cycle Fatigue Behavior in Vacuum of a 316L Type Austenitic Stainless Steel Between 20 and 600 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#176;C-Part I Fatigue Resistance and Cyclic Behavior Cyclic Deformation and Fatigue Behaviour of Ion-Nitrided Steel, Current-Dependent Dynamics of Bidirectional Self-Folding for Multi-Layer Polymers Using Local Resistive Heating.J.Eng FRACTOGRAPHICALLY-AIDED ANALYSIS OF FISH-EYEcycle and very high cycle fatigue behaviour of specimens without any surface hardening layer.Key words sh-eye,striations,fractography,nitrided steel 1.Introduction Case hardening processes,such as nitriding,induction hardening,carburization or shot peeningEffect of nitriding and shot-peening on the fatigue Mar 01,2012 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#0183;42CrMo4 steel is employed to make gear in automobile industry and nitriding is often used to increase hardness and modify fatigue life.Although there are many investigations on shot peening on carburized steel,especially there is little research on effect of nitriding and following shot peening on bending-fatigue of 42CrMo4 steel.
Cyclic strain control tests have been performed on cylindrical specimens of cast polycrystalline Inconel 792-5A superalloy at 23,500,700 and 800 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#176;C in laboratory atmosphere to study the effect of temperature on the fatigue behavior.Cyclic hardening-softening curves and fatigue life curves were measured.Scanning electron microscopy was used to investigate the surface relief.Effect of Plasma Nitriding on Fatigue Behavior of Ti21 nitrided alloy.A nitrogen diffusion layer was formed between the substrate and the titanium 22 nitrides.Plasma nitriding resulted in an increase in low cycle fatigue strength,whereas at high 23 cycles,both conditions exhibit similar behavior.The fracture surface of the fatigue tested specimens 24 clearly revealed the lamellar Effect of Plasma Nitriding on Fatigue Behavior of Ti-6Al The Ti-6Al-4V alloy is widely used in the manufacture of components that should have low density,high corrosion resistance,and fatigue strength.The fatigue strength can be improved by surface modification.The aim of this study was to determine the influence of plasma nitriding on the fatigue behavior of Ti-6Al-4V alloy with a lamellar microstructure (Widmanstauml;tten type).
 J.Qian and A.Fatemi,Cyclic deformation and fatigue behavior of ion-nitrided steel Int.J.Fatigue Vol.17,No.1,pp.15-24,1995  P.De la Cruz,M.Ode Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#180;n,T.Ericsson,Influence of plasma nitriding on fatigue strength and fracture of a B-Mn steel,Materials Science and Engineering A242 (1998) 181194Crack-Growth Behavior of Laser Surface-Alloyed LowApr 12,2013 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#0183;Crack-growth behavior of Nd:YAG laser surface-alloyed as-received low-carbon steel Fe360B was evaluated.Thin surface layer was alloyed with silicon carbide SiC.During laser surface alloying process SiC powder dissolved in the melted pool.The surface-alloyed layer had as-solidified structure composed mainly of dendrites of ferrite,fine martensite needles,and retained austenite.Crack initiation in the very high cycle fatigue regime of Aug 07,2017 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#0183;Crack initiation in the very high cycle fatigue regime of nitrided 42CrMo4 steel - Volume 32 Issue 23 - Anja Weidner,Tim Lippmann,Horst Biermann Very high cycle fatigue behaviour of 42CrMo4 steel with plate-like alumina inclusions About the role of residual stresses and surface work hardening on fatigue K th of a nitrided and shot
Upon prediction of the low-cycle fatigue life,the total energy dissipated during the entire fatigue life of steel reinforcing bars can also be predicted based on the predicted fatigue life.Cited by 84Publish Year 2012Author Mohamed Ali Terres,Nabil Laalai,Habib SidhomThe influence of PVD coating on the low cycle fatigue Jul 15,2017 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#0183;However,the positive effect of coating has been found only for the high cycle fatigue regime,while for the low cycle fatigue this effect was negligible.Similar results have been published by Ferreira et al.,who studied the fatigue behaviour of 42CrMo4 steel with PVD coating.Cited by 6Publish Year 2017Author Anja Weidner,Tim Lippmann,Horst Biermann10.1016/j.matdes.2011.04.047 DeepDyveJun 11,2020 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#0183;The local equivalent strain-fatigue life prediction method coupled with fracture mechanics was found to be a successful approach for predicting the fatigue behaviour of the nitrided steel.This is by taking into account the stabilized residual stresses and the low cycle fatigue characteristics and the core material cracking [3,12] .
Nitriding process is a chemical-heat treatment consists in introducing nitrogen into metallic materials to improve their surface hardness,fatigue life,wear and corrosion resistance    .In engineering the depth of nitriding is generally about 0.3 - 0.4 mm; this thin harder surface layer may cause surface layer spall from matrix because of high-applied load or great stress gradient in Cited by 58Publish Year 2010Author M.A.Terres,S.Ben Mohamed,H.SidhomEffect of nitriding on low-cycle fatigue properties Jan 01,1997 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#0183;In the present study the low-cycle fatigue behaviour of gas-nitrided steel (42CrMo4 ENt0083) is con- sidered.The nitriding treatment was carried out in two phases,characterized by different temperatures,durations and ammonium dissociation degrees.The temperature and duration strongly influence the hard- ness and the depth of the external case.Cited by 54Publish Year 1997Author M Guagliano,L VerganiEffect of nitriding and shot-peening on the fatigue In this study,the short crack initiation and growth behaviour in a notched sample under low-cycle fatigue (LCF) was investigated in a low-pressure steam turbine material.
Low cycle fatigue tests at rates of total imposed deformation (0.5,0.6,0.7,0.8,0.9,1%) were carried out on steel 42CrMo4 specimens in a untreated and in a nitrided states (fig.1b).These tests took place with a loading ratio R = -1 and under a frequency = 1Hz.Cited by 3Publish Year 2017Author Mohamed Ali Terres,Rafik Bechouel,Salem Ben MohamedFatigue life evaluation of 42CrMo4 nitrided steel by local Jan 01,2012 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#0183;The ion nitriding introduce a metallurgical modification into the surface layers of 42CrMo4 steel,characterized by the appearance of a compound layer and a diffusion layer,considered as favourable on the fatigue resistance,where the nitrogen is inserted as a solid solution or in the shape of carbonitride or nitride precipitates,,.Cited by 1Publish Year 2017Author Mohamed Ali Terres,Lotfi Ammari,Abdelkarim Ch Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#233;rifNeutron diffraction measurements for residual stress Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4 Steel.January 2017 International Journal of Materials Science and Applications.Mohamed Ali Terres; Steel 42CrMo4,used in the
29 on quenched and tempered 42CrMo4 cast steel clearly reveal the influence of NMIs on fatigue behavior.The results show that clusters of individual endogenous NMIs with small dimensions (below 5 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#181;m) act as internal crack initiation sites.Cited by 16Publish Year 2012Author Mohamed Ali Terres,Habib SidhomInfluence of ion nitriding on fatigue strength of low Nov 01,2010 Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#0183;This reveals that the ion nitriding improves the fatigue strength with high number of cycle (HCF) (Fig.6).The endurance limits at 10 6 cycles,determined by the staircase method are regrouped in Table 4,reveals a fatigue strength improvement evaluated to 35% for 42CrMo4 steel after ion nitriding.Characteristics of fatigue crack initiation and fatigue To investigate the effect of nitriding layer on both fatigue crack initiation and fatigue life,turbine rotor steel (lCr-IMo-0.25V steel) specimens were nitrided by the nitemper method and then put to a rotary bending fatigue test at room and elevated temperatures.In nitriding,temperature and time were controlled to obtain a different nitrided thickness.
cycle with the same reaction chamber,by simply extending the treatment program./6/ Figure 5 shows a cross section of a plasma nitnded and TiN coated hardening (gradient layer type) steel substrate.Figure 5 Figure 6 Gradient layer on a 42CrMo4 Nitrided and Coated milling cutter Figure 6 shows a cross section of a plasma nitnded and TiN coated A Study on Surface Modification of Al7075-T6 Alloy against At low cycle fatigue (LCF) tests,SP enhances the materials fretting fatigue behavior much better than DR.SP increased fretting fatigue life by 300% for the tested specimens.The effect of DR on fretting fatigue resistance was more pronounced in high cycle fatigue,with a recorded improvement of about 700% at higher rolling forces.12345NextEFFECT OF HEAT TREATMENT ON THE FATIGUEInfluence of ion nitriding on fatigue strength of low-alloy (42CrMo4) steel Experimental characterization and predictive approach,International Journal of Fatigue 32,2010..Kenan Genel,Mehmet Demirkol and Mehmet C,Effect of ion nitriding on fatigue behaviour of AISI 4140 steel,Materials Science and Engineering,26 August
Conclusions long cycle fatigue wear (16 and 36 h),the obtained global linear relationship is not a coincidence since each one follows a linear AISI H13 hot tool steel samples were pulsed plasma nitrided for behavior between mass loss,hardness and layer thickness .(PDF) Impact and Sliding Wear Properties of Single Layer The current paper provides a comparison of impact wear and sliding wear properties of the hard PVD single layer TiN and Ti(C,N),multilayer (Ti,Al)N and nanocomposite FiVIc Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4coatings,deposited onto plasma nitrided low-alloy 42CrMo4 steel.(PDF) Fatigue behaviour of 42CrMo4 steel under contactThe main goal of the project is determination of low cycle fatigue properties of sintered material made of powder mixture H Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#246;gan Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4#228;s Distaloy AB with addition of 0,58 wt% of Kenolube P11 and 0,3 wt