Short fatigue crack behaviour of LZ50 railway axle steel

Short fatigue crack behaviour of LZ50 railway axle steel

Send us a Message

Product Detailed

The effect of roll-forming onto fatigue life of railway axles

This improved fatigue crack growth approach is calibrated for two common material grades for railway axles,namely EA4T and EA1N,and implemented into crack growth assessment software tools.Read moreSurface Rolling Effect on Effective Short Fatigue Cracks Surface rolling effect on effective short fatigue cracks density,which reflect the affecting capacity on the initiation firstly and then growth of the dominant short crack result finally in specimen failure,is experimentally studied by a replica technique.Two groups of smooth hourglass shaped specimens of LZ50 axle steel with/without rolled surfaces were tested.Some results are removed in response to a notice of local law requirement.For more information,please see here.

Short fatigue crack propagation threshold of railway LZ50

Collective short fatigue behaviour nearby material micro-structural barrier threshold is experimentally observed for the smooth specimens of Chinese railway LZ50 axle steel.Effective micro-cracks Short fatigue crack behaviour of LZ50 railway axle steel Short fatigue crack behaviour of LZ50 railway axle steel#0183;The short fatigue short crack replica tests using LZ50 axle steel hourglass-shaped specimens of were carried out under rotating-bending cyclic load.Seven sets of effective test dataShort Fatigue Crack Propagation Threshold of Railway LZ50 Collective short fatigue behaviour nearby material micro-structural barrier threshold is experimentally observed for the smooth specimens of Chinese railway LZ50 axle steel.Effective micro-cracks which result in the specimens failure were initiated from the material ferrite particles on the surfaces of

Short Fatigue Crack Propagation Threshold of Railway LZ50

Collective short fatigue behaviour nearby material micro-structural barrier threshold is experimentally observed for the smooth specimens of Chinese railway LZ50 axle steel.Effective micro-cracks which result in the specimens failure were initiated from the material ferrite particles on the surfaces ofShort Fatigue Crack Propagation Threshold of Railway LZ50 Abstract Collective short fatigue behaviour nearby material micro-structural barrier threshold is experimentally observed for the smooth specimens of Chinese railway LZ50 axle steel.Effective micro-cracks which result in the specimens failure were initiated from the material ferrite particles on the surfaces of the specimens.Short Fatigue Crack Growth at Different Maintenance Times Short fatigue crack behaviour of LZ50 railway axle steel#0183;Based on the average fatigue life of LZ50 axle steel specimens without surface rolling,five maintenance times were determined.Accordingly,five groups of specimens were turned and rolled at above maintenance times and were fatigued using a replica technique.The results show that the crack growth rate is much lower than that before rolling at a given dominant short crack size.

Previous123456NextShort fatigue crack propagation threshold of railway LZ50

Collective short fatigue behaviour nearby material micro-structural barrier threshold is experimentally observed for the smooth specimens of Chinese railway LZ50 axle steel.Effective micro-cracks On the residual life assessment of high-speed railway lated onto a powered axle made of 34CrNiMo6 steel [16,17].To derive the remaining life of sampled axles,a fatigue crack growth (FCG) model based on low cycle fatigue (LCF) response from open data was employed [9,18].Then,a realistic three-dimen-sional (3D) nite element model with an initial semi-elliptical crack at the transitionOn the residual life assessment of high-speed railway To predict the residual life of high-speed railway axles,an induction hardened driving axle made of 34CrNiMo6 steel was exampled with a semi-elliptical crack at the transition between the driving gear unit and wheel in Figure 3.The distance between journal centres,axial length and journal diameter are 1980 mm,2160 mm,and 130 mm,respectively.

Influence of laser shock peening on fatigue performance of

The fatigue limit was increased by 30%,that is,from around 130 to around 170 MPa.The fracture surfaces could be divided into three regions crack initiation,crack propagation,and shortbreak regions.In the crack initiation region,the fatigue striation of the LSPtreated steel was denser than the untreated steel.Influence of laser shock peening on fatigue performance of Apr 26,2020 Short fatigue crack behaviour of LZ50 railway axle steel#0183;The fatigue limit was increased by 30%,that is,from around 130 to around 170 MPa.The fracture surfaces could be divided into three regions crack initiation,crack propagation,and shortbreak regions.In the crack initiation region,the fatigue striation of the LSPtreated steel was denser than the untreated steel.Fatigue properties and fatigue strength evaluation of Mar 01,2020 Short fatigue crack behaviour of LZ50 railway axle steel#0183;Though the fatigue properties of railway axle steel have been investigated by several researchers,due to the fact that both the surface scratch and foreign object damages of railway axles have a 3-demensional size with various shape,more fatigue tests and fatigue strength evaluation should be conducted to increase the service reliability of

Fatigue crack growth in railway axle specimens

The issue of transferability of crack propagation parameters from small-scale specimens up to real-scale com-ponents is investigated.Crack growth material parameters are determined based on single edge notched bendingSE(B) specimen tests and the crack growth model is validated by 1:3 scaled railway axle experiments as well asfor 1:1 test axles focusing on the steel grade EA4T.Fatigue crack growth in railway axle specimens The issue of transferability of crack propagation parameters from small-scale specimens up to real-scale com-ponents is investigated.Crack growth material parameters are determined based on single edge notched bendingSE(B) specimen tests and the crack growth model is validated by 1:3 scaled railway axle experiments as well asfor 1:1 test axles focusing on the steel grade EA4T.Experimental Observations of Dominant Effective Short ,was experimentally investigated by a replica technique to seven smooth hourglass shaped specimens for railway LZ50 axle steel.Character of two-stages,i.e.the micro-structural short crack (MSC) stage and the physical short crack (PSC) stage,was revealed for the crack initiation and growth.Most importantly,the crack growth rate exhibited decelerations twice in MSC stage.

Evolution of effective short fatigue cracks density of

Short fatigue crack density evolution on specimen surface of railway LZ50 axle steel is studied experimentally by local and overall viewpoints,respectively.Evolution of effective short fatigue cracks density of Short fatigue crack density evolution on specimen surface of railway LZ50 axle steel is studied experimentally by local and overall viewpoints,respectively.Evolution of Effective Short Fatigue Cracks Density of Short fatigue crack density evolution on specimen surface of railway LZ50 axle steel is studied experimentally by local and overall viewpoints,respectively.Results indicate that the density of effective short fatigue cracks (ESFCs) around dominant crack,which results in the specimen failure,evolutes sensitively to the changes of the dominant crack size and tip locations.

Design of railway axle in compliance with the European

A railway axle is the typical mechanical component working under effects of rotating bending,at high number of cycles.Historically,the beginning of extensive fatigue studies were conducted on railway axles (Woehler studies).That i s why bending fatigue strength is so important to determine for a railway specialized steel.Cited by 2Publish Year 2018Author B.Yang,S.Dai,Y.Y.Wu,Z.Liao,S.Liang,S.N.XiaoStudy on Short Fatigue Crack Behaviour of LZ50 Steel Under Jan 08,2020 Short fatigue crack behaviour of LZ50 railway axle steel#0183;In the present study,taking LZ50 steel,a commonly used material for railway axles in China,as an example,the low cycle fatigue test was carried out under axial-torsion loading to study the short fatigue cracks behaviour of the material.Cited by 2Publish Year 2010Author Bing Yang,Yong Xiang ZhaoShort Fatigue Crack Growth at Different Maintenance Times Short fatigue crack behaviour of LZ50 railway axle steel#0183;Based on the average fatigue life of LZ50 axle steel specimens without surface rolling,five maintenance times were determined.Accordingly,five groups of specimens were turned and rolled at above maintenance times and were fatigued using a replica technique.The results show that the crack growth rate is much lower than that before rolling at a given dominant short crack size.

Cited by 12Publish Year 2012Author Bing Yang,YongXiang ZhaoShort Fatigue Crack Propagation Threshold of Railway LZ50

Collective short fatigue behaviour nearby material micro-structural barrier threshold is experimentally observed for the smooth specimens of Chinese railway LZ50 axle steel.Effective micro-cracks which result in the specimens failure were initiated from the material ferrite particles on the surfaces ofAuthor Yong Xiang Zhao,Z.He,B.YangPublish Year 2012Experimental research on dominant effective short fatigue Feb 01,2012 Short fatigue crack behaviour of LZ50 railway axle steel#0183;LZ50 steel is one of the widely applied axle material in Chinese railway manufacturing industry.Present research is based on the fatigue tests by a replica technique of this material.The deceleration behavior of crack growth in MSC stage is observed and the interrelation between the inherent micro-structural barriers and the crack initiation and growth is revealed.Author Bing Yang,Zhen Liao,Shoune Xiao,Guangwu Yang,Tao Zhu,Xiangning ZhangPublish Year 2020Short fatigue crack propagation threshold of railway LZ50 Collective short fatigue behaviour nearby material micro-structural barrier threshold is experimentally observed for the smooth specimens of Chinese railway LZ50 axle steel.Effective micro-cracks

An investigation on rotatory bending fretting fatigue

Aug 14,2013 Short fatigue crack behaviour of LZ50 railway axle steel#0183;Zhibiao Xu,Jinfang Peng,Jianhua Liu,Xiyang Liu,Wulin Zhang and Minhao Zhu,Study on fretting wear and tribo-chemical behavior of LZ50 axle steel in torsional fretting fatigue,Wear,10.1016/j.wear.2018.12.074,426-427,(704-711),(2019).An investigation on rotatory bending fretting fatigue Aug 14,2013 Short fatigue crack behaviour of LZ50 railway axle steel#0183;Zhibiao Xu,Jinfang Peng,Jianhua Liu,Xiyang Liu,Wulin Zhang and Minhao Zhu,Study on fretting wear and tribo-chemical behavior of LZ50 axle steel in torsional fretting fatigue,Wear,10.1016/j.wear.2018.12.074,426-427,(704-711),(2019).An investigation of the effects of corrosion on the AbstractCorrosion fatigue is an important topic in the evaluation of the structural integrity of railway axles.In fact,several recent axle failures have been attributed to the presence of corrosi

An Improved Projection Method for Determination of Fatigue

Mar 28,2016 Short fatigue crack behaviour of LZ50 railway axle steel#0183;B.Yang and Y.X.Zhao,Experimental research on dominant effective short fatigue crack behavior for railway LZ50 axle steel, Int.J.Fatigue,35,7178 (2012).Article Google ScholarA physically short fatigue crack growth approach based on The model captures both long and physically short fatigue crack growth behavior,but the emphasis of this contribution is on the modifications for physically short cracks based on empirical models found in the literature. The predictions for physically short cracks from this model coincide well with experimental data for the railway axle A MODEL FOR SHORT FATIGUE CRACK PROPAGATIONBing Yang and YongXiang Zhao,Experimental research on dominant effective short fatigue crack behavior for railway LZ50 axle steel,International Journal of Fatigue,35,1,(71),(2012).Crossref Z.N.Ismarrubie,Aidy Ali,T.Satake and M.Sugano ,Influence of microstructures on fatigue damage mechanisms in Ti-15-3 alloy ,Materials Design

7ZR'LIIHUHQW DOFXODWLRQ0HWKRGV

Test material applied in present work is LZ50 axle steel,which is originated from an RE2B type railway axle.Test specimens were machined into a smooth axial funnel shape,while the axial of specimens were established the basic frame for the study of short fatigue crack behavior.Based on this criterion,the original data of dominant 12345NextShort Fatigue Crack Behavior of LZ50 Axle Steel Under Short fatigue crack behaviour of LZ50 railway axle steel#0183;The short fatigue short crack replica tests using LZ50 axle steel hourglass-shaped specimens of were carried out under rotating-bending cyclic load.Seven sets of effective test data were obtained.The analysis demonstrated that short fatigue cracks generally originate in ferrite grains or on their boundaries,and then short cracks start propagating,which is strongly influenced by the 1,1 1,1 - MDPIobstacles on short fatigue cracks propagation.In the present study,taking LZ50 steel,a commo nly used material for railway axles in China,as an example,the low cycle fatigue test was carried out under axial-torsion loading to study the short fatigue cracks behaviour of the material.Moreover,a new approach considering the microstructure

1,1 1,1 - MDPI

obstacles on short fatigue cracks propagation.In the present study,taking LZ50 steel,a commo nly used material for railway axles in China,as an example,the low cycle fatigue test was carried out under axial-torsion loading to study the short fatigue cracks behaviour of the material.Moreover,a new approach considering the microstructure

Steel material

Steel Grade

Send us a Message

Carbon low alloy steel

A283 Grade A,A36,A572 Grade 42,A572 Grade 50 .

Learn More

Weathering steel plate

Corten A,A588Grade B,S355J0WP,S355J2WP,05CuPCrNi.

Learn More

Shipbuilding Steel Plate

ABS/A steel,ABS AH32,LR AH36,RINA EH36.

Learn More

Alloy Steel Plate

50CrMo4,42CrMo4,12Cr1MoV,25MnTi.

Learn More