Cyclic Deformation and Fatigue of Metals Book Description An integral review is given in this book on the fatigue phenomenon covering the fundamentals of fatigue damage initiation,relevant factors influencing fatigue crack propagation and fatigue life,random load analysis,and simulation for theoretical and experimental fatigue life assessment. Fatigue Behavior and Life Prediction Model of a The fatigue behavior of a nickel-base superalloy was investigated under total strain-controlled mode at high temperature.The fatigue life,cyclic stress response behavior and hysteresis loop of the superalloy were investigated under isothermal low cycle fatigue (LCF) conditions.The superalloy exhibited cyclic hardening and softening behaviors during the process of fatigue loading. Twinningdetwinning behavior during the strain The twinning and detwinning behavior in a strongly textured magnesium alloy was investigated using in situ neutron diffraction during the cyclic deformation along the prior extrusion direction at the fully reversed total constant strain amplitude of 1.2% at room temperature.The initial preferred orientation places the c-axis in most grains perpendicular to the loading axis,and this favors
The effects of loading path and strain amplitude ratio on the cyclic behavior and fatigue life were investigated on a 316LN nuclear grade stainless steel employing a series of symmetrically strain (PDF) Cyclic Stress-Strain Behavior and Low Cycle Fatigue Cyclic deformation characteristics of a rare-earth (RE) element containing extruded Mg-10Gd-3Y-0.5Zr (GW103K) magnesium alloy were evaluated via strain-controlled low-cycle fatigue tests under (PDF) Cyclic deformation behavior and low cycle fatigue Cyclic deformation behavior and low cycle fatigue life of normalized medium carbon steel with hydrogen charging
Low cycle fatigue,ratcheting and dependence of their deformation response on previous deformation histories are investigated at room temperature laboratory environment for SA333 CMn steel.It is noticed that cyclic hardening/softening response of(PDF) Low cycle fatigue behavior of Ti6AI2Sn4Zr6Mo Part A series of strain-controlled low cycle fatigue tests have been carried out on Ti-6-2-4-6 at room temperature primarily for solution-treated and aged material.Tension-compression testing at R = 1 produced softening,irrespective of the morphology of(PDF) Low-cycle fatigue behavior of INCONEL 718 superalloy Symmetrical push-pull low-cycle fatigue (LCF) tests were performed on INCONEL 718 superalloy containing 12,29,60,and 100 ppm boron (B) at room temperature (RT). Download Free PDF. as was observed.The relationship between the microstructure and cyclic deformation behavior is known to be complex,especially for high-strength commercial
The main factor in crack propagation is the highly concentrated cyclic plastic deformation within the plastic zone at the crack tip.For annealed OFHC,the first stage is about 3% of the total life cycle,that is,within 3% of total fatigue cycles,the stress-strain curve will be stabilized or saturated as shown in Fig.1 for polycrystalline copper.(PDF) Temperature effect on low-cycle fatigue behavior of The cyclic deformation behavior and low-cycle fatigue (LCF) failure of precipitation-hardened nickel base superalloys is strongly inuenced by temperature ,frequency[5,1113] ,strain rate ,crystallographic orientation[14,15] and environment etc.Tension-compression asymmetry of the cyclic hardening or softening has Author Jaroslav Polák(PDF) Low cycle fatigue behavior of Inconel 718 at 298 K Jul 01,1977·The cyclic stress-strain response and the low cycle fatigue life of conventionally heat treated Inconel 718 were studied.Fully reversed strain-controlled tests were performed at
understand the fatigue and cyclic deformation behavior of AA6061 aluminum alloys.Several studies were conducted to understand the fatigue behavior of aluminum alloys over the years,especially on age-hardening aluminum alloys,such as the 2xxx and 7xxx alloys [1,2,616].Author Sida Mu,Yajing Li,Danrong BBNg,Bin Xu,Xu ChenPublish Year 2021Cyclic hardening and fatigue behavior of stainless steel Sep 14,2010·Abstract.This article discusses cyclic hardening and fatigue behaviors of stainless steel 304L,the behavior of which is greatly influenced by prior loading.Effects of loading sequence,mean strain and mean stress,and pre-straining (PS) were investigated using constant amplitude as well as step and random loading tests.Contrary to common expectations,fatigue lives in strain-controlled meanCited by 10Publish Year 1982Author Yashwant Mahajan,Harold MargolinLow Cycle Fatigue of 9-12% Cr Steel at Elevated Zhao,P,Xuan,F, Wu,D.Low Cycle Fatigue of 9-12% Cr Steel at Elevated Temperature Cyclic Deformation Behavior and Life Assessment. Proceedings of the ASME Turbo Expo 2016 Turbomachinery Technical Conference and Exposition.Volume 7A Structures and Dynamics.Seoul,South Korea.June 1317,2016.V07AT28A010.ASME.
Aug 01,2020·During cyclic deformation,cyclic hardening followed by cyclic softening occurred until fatigue failure in the three test specimens at the total strain amplitude of 0.4%.At the total strain amplitude of 0.8%,cyclic hardening followed by transient cyclic stability occurred in the 10DASS at the initial deformation stage.Cited by 25Publish Year 2004Author L.Xiao,M.C.Chaturvedi,D.L.ChenCyclic Deformation,Crack Initiation,and Low-cycle FatigueDec 31,2003·Request PDF On Dec 31,2003,J.Polák published Cyclic Deformation,Crack Initiation,and Low-cycle Fatigue Find,read and cite all the research you need on ResearchGateCited by 26Publish Year 2014Author Hong Hao,Hong Hao,Duyi Ye,Chuanyong ChenLow cycle fatigue behavior of Ti-6AI-2Sn-4Zr-6Mo Part II A series of strain-controlled low cycle fatigue tests have been carried out on Ti-6-2-4-6 at room temperature primarily for solution-treated and aged material.Tension-compression testing at R = 1 Low cycle fatigue behavior of Ti-6AI-2Sn-4Zr-6Mo Part II.
Mar 02,2021·Abstract.In this study,the low cycle fatigue behavior and failure mechanism of WAAM 16MND5 bainitic steel,which is commonly used in the nuclear reactor,were investigated thoroughly via a series of strain-controlled and stress-controlled low cycle fatigue tests.Results show that the microstructure of WAAM 16MND5 steel is granular bainite with a certain number of banded proCited by 315Publish Year 1977Author D.Fournier,A.PineauMultiaxial Cycle Deformation and Low-Cycle Fatigue The multiaxial cycle deformation and fatigue behavior of Q235B mild carbon steel and its related welded metal are experimentally investigated in the present paper.The following conclusions can be drawn (1) Significant additional cyclic hardening effect is observed for both base steel and welded metal under out-of-phase loading conditions.Besides,welding process produces extra additional hardeningCited by 31Publish Year 2011Author Julie Colin,Ali Fatemi,Said Taheri12345NextLow cycle fatigue properties and cyclic deformation particularly affected by the cyclic deformation caused by twinning at higher total strain amplitudes in the case of extruded magnesium AZ31 alloy.The objective of this investigation is to evaluate the low cycle fatigue properties of as-extruded magnesium AZ31 alloy and study its cyclic deformation behavior
Oct 05,2017·Cyclic stress responses during low cycle fatigue of a Re-bearing Ni-base single crystal superalloy with , and  orientations have been investigated at 980 °C,and attention is paid to the corresponding deformation microstructure to establish a clear microstructure-mechanical relationship.It is found that deformation of the  specimens with increased strain amplitude is characterized by cyclicCited by 5Publish Year 2017Author Quan Wang,Wencai Liu,Guohua Wu,Xiangjun Chen,Haohao ZhangLow-Cycle Fatigue Deformation Behavior and Evaluationalloys.In this study,both of total strain and stress controlled low-cycle fatigue tests of the extruded rod of three types of materials,AZ31,AZ61 and AZ80,were carried out in ambient atmosphere at room temperature to investigate the cyclic deformation behavior and evaluate the fatigue life.2.Experimental Procedures 2.1.Testing materials Cited by 9Publish Year 2010Author H.Wang,Q.Y.Sun,L.Xiao,J.Sun,P.GeCyclic stressstrain behavior and low cycle fatigue life All alloys exhibited the cyclic hardening behavior,and raising Ti could increase the cyclic hardening ability.The fatigue life was mainly controlled not by the Ti-addition method but by the Ti content.Interestingly,the low yield stress and high plastic strain energy consumed during the cyclic deformation,the alloys with 0.10% Ti possessed the longer fatigue life compared to those alloys with
Total strain controlled cyclic deformation under fully-reversed loading and low cycle fatigue properties were measured.The mechanical test results demonstrated that the composite materials in different aged conditions cyclically hardened at the applied strain amplitudes,typically at 0.4%,0.6% and 0.8%.Deformation Behavior of Zircaloy-4 Cladding underA low-cycle fatigue test,where a constant pressure dier-ence was applied to the Zircaloy-4 cladding,was performed in this study.A sawtooth waveform was applied,where the fect cladding behavior under cyclic deformation.Hence,cy-Fig.3 Stress-strain curve of the Zircaloy-4,strained along the cir-Ductile vs.brittle fractureFatigue (cyclic stresses) 9Cyclic stresses,the SN curve 9Crack initiation and propagation 9Factors that affect fatigue behavior Creep (time dependent deformation) 9Stress and temperature effects 9Alloys for high-temperature use Not tested in 8.5 Fracture Toughness 8.14 Data extrapolation methods
dynamic responses to cyclic stresses.We present a unique electrokinetic microuidic system for the study of dynamic fatigue behavior of RBCs subjected to cyclic loads.Our work shows quantitatively how the cyclic stretching loads cause membrane mechanical degradation andEffect of Boron on the Low-Cycle Fatigue Behavior and  Uniaxial fatigue tests have shown that the cyclic deformation response of IN718 can be divided into two regimes. In the first regime,cyclic hardening occurs,extending up to about 100 cycles at low plastic strain amplitudes and decreasing as the plastic strain amplitude increases.In the second regime,which extends throughout theEffect of Boron on the Low-Cycle Fatigue Behavior and  Uniaxial fatigue tests have shown that the cyclic deformation response of IN718 can be divided into two regimes. In the first regime,cyclic hardening occurs,extending up to about 100 cycles at low plastic strain amplitudes and decreasing as the plastic strain amplitude increases.In the second regime,which extends throughout the
Effect of deformation temperature on low-cycle fatigue properties of an Fe-28Mn-6Si-5Cr shape memory alloy was investigated.Cyclic push-pull loadings at a total strain range of 0.02 were applied to the alloy at various deformation temperatures ranging from 223 to 523 K.Effects of Temperature and Deformation Rate on Cyclic Cyclic deformation behavior and fracture mechanisms of Ferrovac E iron under low cycle fatigue conditions are studied at temperatures ranging from 23 to 540 C,cyclic deformation rates from 4 × 10-4 to 2 × 10-1 s-1,and strain ranges from 0.010 to 0.040.The stress response during strain cycling shows three stages,primary hardening,steady state behavior,and secondary hardening.Fatigue :Failure under fluctuating / cyclic stressThe total number of cycles to failure is the sum of cycles at the first and the second stages N f = N i + N p N f Number of cycles to failure N i Number of cycles for crack initiation N p Number of cycles for crack propagation High cycle fatigue (low loads) N i is relatively high.With increasing stress level,N
controlled constant amplitude pulsating fatigue experiments were conducted on heat-treated AM NiTi specimens at room temperature (~24°C) to investigate their cyclic deformation and fatigue behavior.Fatigue lives of AM NiTi specimens were observed to be shorter than wrought material specifically in the high cycle fatigue regime.Influence of heat treatment on cyclic deformation and low May 30,2017·Influence of heat treatment on cyclic deformation and low-cycle fatigue behavior of sand-cast Mg10Gd3Y0.5Zr magnesium alloy - Volume 32 Issue 11Lecture-14-15-part-II.pdf - Fatigue Failure under Lecture-14-15-part-II.pdf - Fatigue Failure under fluctuating stress Under fluctuating cyclic stresses failure can occur at lower loads than under a. vs.N (number of cycles to failure) Low cycle fatigue small # of cycles high loads,plastic and elastic deformation High cycle fatigue large # of cycles low
Since then research in low cycle fatigue has proceeded rapidly.The vital interest of engineers and researchers in communicating the rapid advances in the ongoing research in low cycle fatigue has encouraged me to initiate again the Second International Conference which was held in Munich,FRG,7-11 September 1987.Low and High Cycle Fatigue Fracture Fatigue (Material)Low and High Cycle Fatigue - Free download as Powerpoint Presentation (.ppt),PDF File (.pdf),Text File (.txt) or view presentation slides online.Low and High cycle fatigue Stress life and Strain Life approach Practical ApplicationsLow cycle fatigue behavior of inconel 718 at 298 K and 823 Jul 01,1977·The cyclic stress-strain response and the low cycle fatigue life of conventionally heat treated Inconel 718 were studied.Fully reversed strain-controlled tests were performed at room temperature and at 823 K.Optical and electron microscopy were used to study the development of deformation and cracking during cycling.A power-law relationship between life-time and plastic strain
particularly affected by the cyclic deformation caused by twinning at higher total strain amplitudes in the case of extruded magnesium AZ31 alloy.The objective of this investigation is to evaluate the low cycle fatigue properties of as-extruded magnesium AZ31 alloy and study its cyclic deformation behaviorLow-Cycle Fatigue Deformation Behavior andalloys.In this study,both of total strain and stress controlled low-cycle fatigue tests of the extruded rod of three types of materials,AZ31,AZ61 and AZ80,were carried out in ambient atmosphere at room temperature to investigate the cyclic deformation behavior and evaluate the fatigue life.2.Experimental Procedures 2.1.Testing materials Low-cycle fatigue behavior and deformation substructure of Jun 15,2010·Low-cycle fatigue (LCF) behavior of Ti2Al2.5Zr was investigated at 298 and 673 K.Cyclic stress response curves showed that initial cyclic hardening was followed by cyclic softening at 298 and 673 K,while secondary cyclic hardening appeared when testing temperature increased to 673 K.Ti2Al2.5Zr displayed higher LCF lives at 673 K than those at 298 K.Microstructural
In traditional highcycle fatigue,experimental connections are made between the fatigue life and the cyclic stressing,including a stationary mean stress.Alternatively,an equivalent correlation for highcycle fatigue could be made between fatigue life and the cyclic elastic strain.In low cycle fatigue,the fatigue life is robustly Mechanisms of Fatigue Crack Initiation and GrowthJul 02,2014·Cyclic plastic zone size rc = 1 KI 2y ' 2 Cyclic plastic zone is the region ahead of a growing fatigue crack in which slip takes place.Its size relative to the microstructure determines the behavior of the fatigue crack,i.e..Stage I and Stage II behavior.Multiaxial Cycle Deformation and Low-Cycle Fatigue Multiaxial Cycle Deformation and Low-Cycle Fatigue Behavior of Mild Carbon Steel and Related Welded-Metal Specimen low-cycle fatigue analysis,is modified for the multiaxial cyclic stress and strain responses do not always occur at
May 27,2014·Low-cycle fatigue tests were performed at room temperature in ambient air using a 250 kN closed-loop servohydraulic testing system.Low-cycle fatigue tests were carried out using triangular strain waveform with four strain ratios of R=1,0.06,0.06 and 0.5 at a constant total strain rate of 4×10 3 S 1.The tests were continued until failure with the strain amplitudes ranged from 0.40% to 2.0%.The Influence of Dwell Time on Low Cycle Fatigue Behavior The life of creep-fatigue is reduced 12 times compared with the low cycle fatigue life.The average deformation of fatigue specimen is about 1 mm and cyclic creep specimen is more than 4 mm at final fracture.The plastic deformation of creep-fatigue specimen is about four times than that of fatigue specimen and the fracture mechanism of the
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