Improved Fatigue Strengths of Nanocrystalline Cu and Cu–Al Alloys

An, Xianghai; Lin, Qingyun; Sheng, Wu; Zhang, Zhefeng

doi:10.1080/21663831.2015.1029645

Cited by 60 publications

(30 citation statements)

References 50 publications

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“…e intensive interactions between twin boundaries and dislocations can then lead to subsequent transformation of two-dimensional twin lamellae structures into threedimensional nanograins with their boundary characteristics lying in the form of low angle and high angle. Herein, there is a considerable fraction of low-angle grain boundaries and a high density of dislocations resided in the nonequilibrium high-angle grain boundaries [23]. In addition to plastic deformation-induced grain refinement, straininduced phase transformation is another mechanism by which nanosurface forms during shot peening.…”

Section: Resultsmentioning

confidence: 99%

Shot Peening Effects on Subsurface Layer Properties and Fatigue Performance of Case‐Hardened 18CrNiMo7‐6 Steel

Zhang

et al. 2018

Advances in Materials Science and Engineering

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e present study is conducted with a dual-aim: firstly, to examine the effect of several single shot peening conditions on the subsurface layer properties and fatigue performance of the case-hardened 18CrNiMo7-6 steel, and secondly, to propose an optimized peening condition for improved fatigue performance. By carrying out the subsurface integrity analysis and fatigue testing, the underlying relationships among the peening process, subsurface layer property and fatigue performance are investigated, the way peening conditions affect the fatigue life and its associated scatter for the case-hardened 18CrNiMo7-6 steel is quantitatively assessed. e in-depth study shows that dual peening can be an optimized solution, for it is able to produce a subsurface layer with enhanced properties and eventually gain a significant improvement in fatigue performance.

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Section: Resultsmentioning

confidence: 99%

Shot Peening Effects on Subsurface Layer Properties and Fatigue Performance of Case‐Hardened 18CrNiMo7‐6 Steel

Zhang

et al. 2018

Advances in Materials Science and Engineering

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“…For years, systematic studies on fatigue behaviors of face-center-cubic alloys (especially α-Cu-Al alloys) have been conducted in our research group418192021. According to previous works, two methods can effectively im’prove the fatigue properties: alloying42021 and grain refining1819.…”

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confidence: 99%

“…According to previous works, two methods can effectively im’prove the fatigue properties: alloying42021 and grain refining1819. For the first method, the alloying elements can contribute more than the solution strengthening effect.…”

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confidence: 99%

Exceptional high fatigue strength in Cu-15at.%Al alloy with moderate grain size

Liu

Tian

Zhang

et al. 2016

Sci Rep

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It is commonly proposed that the fatigue strength can be enhanced by increasing the tensile strength, but this conclusion needs to be reconsidered according to our study. Here a recrystallized α-Cu-15at.%Al alloy with moderate grain size of 0.62 μm was fabricated by cold rolling and annealing, and this alloy achieved exceptional high fatigue strength of 280 MPa at 107 cycles. This value is much higher than the fatigue strength of 200 MPa for the nano-crystalline counterpart (0.04 μm in grain size) despite its higher tensile strength. The remarkable improvement of fatigue strength should be mainly attributed to the microstructure optimization, which helps achieve the reduction of initial damage and the dispersion of accumulated damage. A new strategy of “damage reduction” was then proposed for fatigue strength improvement, to supplement the former strengthening principle. The methods and strategies summarized in this work offer a general pathway for further improvement of fatigue strength, in order to ensure the long-term safety of structural materials.

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“…The intensive interactions between twin boundaries and dislocations may then lead to subsequent transformation of two-dimensional twin lamellae structures into three-dimensional nanograins with their boundary characteristics lying in the form of low-angle and high-angle. Herein, there are a considerable fraction of low-angle grain boundaries and a high density of dislocations resided in the non-equilibrium high-angle grain boundaries [13]. In addition to plastic deformationinduced grain refinement, strain-induced phase transformation is another mechanism by which nanosurface forms during shot peening.…”

Section: Figmentioning

confidence: 99%

The effects of shot peening on subsurface layer properties and fatigue performance of case-hardened 18CrNiMo7-6 steel

Xie

Sun

et al. 2018

MATEC Web Conf.

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Abstract. The present study is conducted with a dual-aim; firstly, examine the effect of several single shot peening conditions on the subsurface layer properties and fatigue performance of the case-hardened 18CrNiMo7-6 steel. By carrying out the subsurface integrity analysis and fatigue testing, the underlying relationships among the peening process, subsurface layer property and fatigue performance are investigated, the way peening conditions affect the fatigue life and its associated scatter for the casehardened 18CrNiMo7-6 steel is quantitatively assessed.

show abstract

Improved Fatigue Strengths of Nanocrystalline Cu and Cu–Al Alloys

Cited by 60 publications

References 50 publications

Shot Peening Effects on Subsurface Layer Properties and Fatigue Performance of Case‐Hardened 18CrNiMo7‐6 Steel

Shot Peening Effects on Subsurface Layer Properties and Fatigue Performance of Case‐Hardened 18CrNiMo7‐6 Steel

Exceptional high fatigue strength in Cu-15at.%Al alloy with moderate grain size

The effects of shot peening on subsurface layer properties and fatigue performance of case-hardened 18CrNiMo7-6 steel

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