Low cycle fatigue behavior of precipitation-strengthened Cu-Cr-Zr contact wires

Wang, Junfeng; Chen, Jinshui; Guo, Chengjun; Xiao, Xiangpeng; Wang, Hang

doi:10.1016/j.ijfatigue.2020.105642

Cited by 24 publications

(9 citation statements)

References 34 publications

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“…This phenomenon can be explained by the Hall-Petch theory. [40][41][42][43] The dislocations plugged near the GBs produced a variety of reaction types with the GBs. Different dislocation-GB reaction mechanisms depend on many factors, such as the characteristics of the incident dislocations, applied stress, material type, and GB characteristics.…”

Section: Low-angle Grain Boundary Strengtheningmentioning

confidence: 99%

Microstructural Evolution and Mechanical Properties of Sn‐58Bi Solder Alloys with Different Cooling

et al. 2021

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Herein, influences of air-cooling, water-cooling, and liquid nitrogen-cooling (LN-cooling) on microstructures and mechanical properties of Sn-58Bi alloy are studied. It is observed that nearly complete eutectic structures are obtained in aircooled Sn-58Bi alloy. Fine grains and many low-angle grain boundaries (LAGBs) are obtained in water-cooled Sn-58Bi alloy. The LN-cooling method causes Bi atoms to form large, regular rectangular shapes, and there are many high-angle grain boundaries (HAGBs) distributed inside the specimen. Impact tests are performed at room temperature. When the impact rate is 0.98 m s À1 , the fracture energy of the water-cooled Sn-58Bi alloy peaks to 71.5 mJ. The fracture of the LN-cooled impact specimen has a large cleavage step due to the interaction of cleavage cracks and the HAGBs. These experimental results lay the relevant theoretical foundation for the practical application of Sn-58Bi solder alloys.

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Section: Low-angle Grain Boundary Strengtheningmentioning

confidence: 99%

Microstructural Evolution and Mechanical Properties of Sn‐58Bi Solder Alloys with Different Cooling

et al. 2021

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“…With the rapid development of high-speed electrified railways, researchers showed increasing interest in higher requirements for the performance of contact line materials (higher strength, higher conductivity, higher antisoftening temperature and good plasticity). [1][2][3] Cu-Cr-Zr alloy has become a research hotspot in recent decades due to its advantages to meet these requirements, [4][5][6][7] and previous researchers have shown its importance in the high-speed rail network. 2,6,[8][9][10][11][12] Cu-Cr-Zr alloy used in contact wires are usually produced by semi-continuous casting and cold working.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] Cu-Cr-Zr alloy has become a research hotspot in recent decades due to its advantages to meet these requirements, [4][5][6][7] and previous researchers have shown its importance in the high-speed rail network. 2,6,[8][9][10][11][12] Cu-Cr-Zr alloy used in contact wires are usually produced by semi-continuous casting and cold working. [13][14][15][16] Since cold deformation introduces dislocations, twinning and residual stress, which are considered to be important during preparation process for improving the strength of materials.…”

Section: Introductionmentioning

confidence: 99%

“…Cold deformation increases the strength and hardness of the alloy, whereas ductility and toughness are reduced. 6,13,[18][19][20][21] That is, cold deformation improves the monotonic mechanical properties and reduce the plastic and toughness of the material; at the same time, it may also have a great positive effect on the low cycle fatigue behavior of the material. [22][23][24][25][26][27] However, in recent years, researches on Cu-Cr-Zr alloys have mainly focused on new preparation methods, thermomechanical heat treatment processes and aging precipitation evolution, and there were not many studies on low cycle fatigue.…”

Section: Introductionmentioning

confidence: 99%

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Low cycle fatigue behavior of Cu‐Cr‐Zr alloy with different cold deformation

Chen

Xiao

Xiong

et al. 2022

Fatigue Fract Eng Mat Struct

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The present study addressed the cyclic deformation behavior and fatigue properties of Cu‐0.69Cr‐0.07Zr alloy with different cold deformation (ε = 64%, 75%, and 84%) using low cycle fatigue test. Low cycle fatigue tests were conducted under fully‐reversed conditions at different total strain amplitudes. The microstructure changes and fatigue fracture characteristics were analyzed by scanning electron microscope (SEM) and transmission electron microscope (TEM). The main findings suggest that the Bauschinger effect was significantly stronger with larger deformation at low total strain amplitude. And it was proved that the relationship between the total strain amplitude and the low cycle fatigue life of Cu‐Cr‐Zr alloy with different deformation can be expressed by the Manson–Coffin–Basquin formula. Further, the reason for the fatigue life was shorter and the cyclic softening rate decreased faster at high applied total strain amplitude was that the dislocation density decreased due to the rearrangement of the dislocations.

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“…Figure5compares the HEAs' LCF properties with other conventional metallic materials in terms of the relationship of plastic-strain amplitude versus reversals to failure (2N f )[19,80,[82][83][84][85][86][87][88][89][90][91][92][93][94][95][96]. As highlighted by the orange area, HEAs and MEAs exhibit a better LCF performance than other conventional alloys.…”

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confidence: 98%

Fatigue Behavior and Mechanisms of High-Entropy Alloys

Feng

Liaw

2022

High Entropy Alloys & Materials

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Fatigue failures of structural materials pose enormous risks to in-service structures, as well as human lives. The development of advanced durable structural materials with fatigue resistance has important social impact. The novel concept of high-entropy alloys (HEAs) has engendered considerable attention due to their exhibited unusual mechanical properties, and correspondingly opening a new road to design fatigue-resistant structural materials. The present work discusses and reviews the current findings on fatigue behavior and mechanisms of HEAs. Based on the understanding of fatigue-resistant favorable deformation mechanisms in HEAs, the perspectives from the viewpoint of materials design are provided to advance the development of fatigue-resistant HEAs, and future works are also suggested.

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Low cycle fatigue behavior of precipitation-strengthened Cu-Cr-Zr contact wires

Cited by 24 publications

References 34 publications

Microstructural Evolution and Mechanical Properties of Sn‐58Bi Solder Alloys with Different Cooling

Microstructural Evolution and Mechanical Properties of Sn‐58Bi Solder Alloys with Different Cooling

Low cycle fatigue behavior of Cu‐Cr‐Zr alloy with different cold deformation

Fatigue Behavior and Mechanisms of High-Entropy Alloys

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