Microstructure and properties of Cu-Cr-Zr alloy with columnar crystal structure processed by upward continuous casting

Chen, Jinshui; Xiao, Xiangpeng; Yuan, Dawei; Guo, Chengjun; Huang, Hao

doi:10.1016/j.jallcom.2021.161700

Cited by 13 publications

(3 citation statements)

References 39 publications

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Section: Microstructural Evolutionmentioning

confidence: 99%

“…The direction perpendicular to the molten pool's border is where the grains in the pool tend to grow [25]. As a result, the crystals rapidly form columnar crystals that develop in the opposite direction of heat dissipation [26]. Figure 9 depicts SEM observations of the shape of the molten pool of high nitrogen samples generated at 104.2 J/mm 3 and 156.3 J/mm 3 .…”

Section: Microstructural Evolutionmentioning

confidence: 99%

See 1 more Smart Citation

Process Parameter Optimization for Selective Laser-Melted High-Nitrogen Steel and the Effects on Microstructure and Properties

Sun

Ren

Wang

et al. 2023

Metals

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Chromium nitride powder is blended with pre-alloyed powder to make an overmatched powder with a high nitrogen concentration in order to manufacture high-nitrogen steel by selective laser melting. By employing a wider range of process parameters, the impact of process parameters on the relative density, nitrogen concentration, microstructure, and mechanical properties of high-nitrogen steel is investigated. In simulated human body fluid conditions, the corrosion resistance of high-nitrogen steel, pure titanium, and 316L was compared and evaluated. The findings demonstrate that the relative density of high-nitrogen steel initially rises and then falls with the increase in energy density, reaching a high value of 98.8% at 148.8 J/mm3. With rising energy density, the nitrogen concentration falls. The microstructure of high-nitrogen steel is mainly composed of columnar and cellular grains. Both grain sizes steadily grow, but their mechanical characteristics initially rise and then fall as the energy density rises from 83.3 to 187.3 J/mm3. With yield strength, tensile strength, and elongation reaching 921.9 MPa, 1205.1 MPa, and 27%, respectively, the alloy exhibits outstanding mechanical characteristics when the laser power is 250 W, the scanning speed is 700 mm/s, and the associated energy density is 148.8 J/cm3. The high-nitrogen steel at an energy density of 148.8 J/mm3 has the lowest corrosion rate when compared to pure titanium and 316L steel, which suggests that the HNS alloy will have good corrosion resistance in human body fluid conditions.

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Section: Microstructural Evolutionmentioning

confidence: 99%

Section: Microstructural Evolutionmentioning

confidence: 99%

Process Parameter Optimization for Selective Laser-Melted High-Nitrogen Steel and the Effects on Microstructure and Properties

Sun

Ren

Wang

et al. 2023

Metals

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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%

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

Chen

Xiao

Xiong

et al. 2022

Fatigue Fract Eng Mat Struct

Self Cite

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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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Effect of annealing temperature on dual-structure coexisting precipitates in Cu–2.18Fe–0.03P alloy and softening mechanism at high temperature

et al. 2022

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Microstructure and properties of Cu-Cr-Zr alloy with columnar crystal structure processed by upward continuous casting

Cited by 13 publications

References 39 publications

Process Parameter Optimization for Selective Laser-Melted High-Nitrogen Steel and the Effects on Microstructure and Properties

Process Parameter Optimization for Selective Laser-Melted High-Nitrogen Steel and the Effects on Microstructure and Properties

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

Effect of annealing temperature on dual-structure coexisting precipitates in Cu–2.18Fe–0.03P alloy and softening mechanism at high temperature

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