Fatigue Property of Al-5Zn-2Mg Aluminum Alloy Welding Joints Used in High-speed Trains

Ni, Weiyuan; Yang, Shanglei; Jia, Junbo; Bai, Jian-Ying; Yang, Lin

doi:10.1016/s1875-5372(17)30038-3

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…The post-processing treatments of notched samples noticeably affected the local ratcheting resistance of materials under remotely asymmetric loading cycles. Weiyuan et al [20] conducted fatigue tension-tension tests on aluminum Al-5Zn-2Mg samples post-welded by the process of MIG filler wire welding with an ER5356 welding electrode. They observed the progressive plastic strain mainly within the weld zone as loading cycles proceeded.…”

Section: Introductionmentioning

confidence: 99%

Ratcheting Response of Heat-Treated Notched 1045 Steel Samples Undergoing Asymmetric Uniaxial Loading Cycles

Hatami,

Varvani-Farahani

2024

Applied Mechanics

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The present study evaluates the ratcheting response of notched cylindrical samples made of 1045 steel alloy subjected to asymmetric loading cycles using the kinematic hardening framework, coupled with Neuber’s rule. Test samples with V-shaped and semi-circular edge notches were first heat-treated under different conditions, resulting in various material hardness values at the notch root region. Local ratcheting at the notch root of samples was found to be highly dependent on the notch shape and the heat treatment conditions. HT1 samples with a lower hardness of 12 RC at the notch region possessed higher values of ratcheting, while ratcheting at the notched region for HT2 samples with 40 RC dropped to half of that in HT1 samples. The higher hardness of 50 RC at the notch edge of HT3 samples promoted the initial yield strength and the yield surface through the kinematic hardening rule with a larger translation into the deviatoric stress space as compared with samples HT1 and HT2 with 12 and 40 RC, respectively. The local ratcheting strain in sample HT1, with semi-circular notches (Kt=1.65) at a stress ratio (Smax/Sult) of 0.965, remained below 1.80% during the first hundred loading cycles. The local ratcheting decreased to 1.2% for sample HT2 and further dropped to 0.9% for sample HT3. The yield surfaces were translated consistent with the magnitude and direction of the backstress increments, as the applied loading excursion exceeded the elastic limit. Through the use of the Ahmadzadeh–Varvani (A–V) hardening rule, the predicted ratcheting values at notch roots were found to be larger in magnitudes as compared with those of experimental data, while the predicted local ratcheting through the Chaboche (CH) hardening rule fell below the experimental data. Results consistently showed that as sample hardness increased, the local ratcheting at notch roots decreased.

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Section: Introductionmentioning

confidence: 99%

Ratcheting Response of Heat-Treated Notched 1045 Steel Samples Undergoing Asymmetric Uniaxial Loading Cycles

Hatami,

Varvani-Farahani

2024

Applied Mechanics

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“…In 2004, Huili [3] et al conducted metallographic, hardness, and tensile tests on the weld zone to verify the performance of YC2 titanium alloy after traditional welding. In 2009, Li Jinwei [4] et al studied the microstructure distribution characteristics of Ti60 alloy after electron beam welding. In 2012, E. Dalgaard [5] et al studied the properties of  titanium alloy after linear friction welding by changing the axial pressure during processing.…”

Section: Introductionmentioning

confidence: 99%

Performance Test of Weld Zone of Rotary Friction Welding of Titanium Alloy Drill Pipe

Zhang,

Huang,

et al. 2023

J. Phys.: Conf. Ser.

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With the development of complex oil and gas reservoirs, it is difficult for traditional carbon steel to meet the requirements of drill pipe materials in drilling process. Titanium alloy has gradually become a new choice of drill pipe material because of its low density and good corrosion resistance. Titanium alloy has poor weldability and weld zone of titanium alloy drill string is easy to become initial defect and lead to drill pipe failure. Therefore, it is essential to evaluate the performance of titanium alloy drill pipe weld zone. In this paper, the weld zone of titanium alloy rotary friction welding is tested. Metallographic structure, hardness, tension and impact mechanical tests, fracture toughness evaluation and bending fatigue test are carried out. The test results show that the metallographic structure of weld zone changes under the influence of temperature, resulting in different mechanical properties of weld zone from that of pipe body zone. The yield strength and tensile strength in the weld zone are higher than those in the pipe zone, but the fracture toughness is lower than that in the pipe zone. The fatigue life of specimens in weld zone is more than 107 in drilling mud environment. In general, the mechanical properties of weld zone meet drilling requirements.

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“…Ni et al. [13] found that the fatigue fracture of Al–5Zn–2Mg aluminium alloy MIG joint occurred in the HAZ when the stress level was lower than 50% of joint tensile strength, otherwise it occurred in the fusion zone (FZ). Balasubramanian et al.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the fatigue performance of MIG-welded aluminium alloy joint is the research focus. Ni et al [13] found that the fatigue fracture of Al-5Zn-2Mg aluminium alloy MIG joint occurred in the HAZ when the stress level was lower than 50% of joint tensile strength, otherwise it occurred in the fusion zone (FZ). Balasubramanian et al [14] investigated the influences of pulsed current welding and post-weld ageing treatment on fatigue crack growth behaviour of AA7075 aluminium alloy joints.…”

Section: Introductionmentioning

confidence: 99%

Effect of welding wires on fatigue property of 7N01-T4 aluminium alloy joints

Liu

Wei

Long

et al. 2020

Science and Technology of Welding and Joining

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The effect of ER5356 and ER5087 welding wires on fatigue property of MIG-welded 7N01-T4 aluminium alloy joints was investigated. The microstructure of ER5087 welded joint is similar to that of ER5356 joint. However, the fusion zone of the welding joint with ER5087 has a smaller grain size than that of the joint with ER5356. The fatigue strength of joints welded with ER5356 and ER5087 is 105.9 and 103.2 MPa at 10 7 cycles. During the fatigue process, the crack initiation for joints welded using ER5087 is due to porosity while for ER5356 is due to microcracks from eutectic melting in the heat-affected zone.

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Fatigue Property of Al-5Zn-2Mg Aluminum Alloy Welding Joints Used in High-speed Trains

Cited by 8 publications

References 9 publications

Ratcheting Response of Heat-Treated Notched 1045 Steel Samples Undergoing Asymmetric Uniaxial Loading Cycles

Ratcheting Response of Heat-Treated Notched 1045 Steel Samples Undergoing Asymmetric Uniaxial Loading Cycles

Performance Test of Weld Zone of Rotary Friction Welding of Titanium Alloy Drill Pipe

Effect of welding wires on fatigue property of 7N01-T4 aluminium alloy joints

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