Effect of cold deformation on corrosion fatigue behavior of nickel-free high nitrogen austenitic stainless steel for coronary stent application

Li, Jun; Yang, Yixun; Ren, Yujie; Dong, Jiahui; Ke, Yang

doi:10.1016/j.jmst.2017.10.002

Cited by 27 publications

(10 citation statements)

References 37 publications

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“…The mean tensile properties and their standard deviations of the solution annealed and the work-hardened samples are listed in Table 2. As has been shown earlier by many authors [1,9,10,30,31], such interstitially alloyed austenites reveal a marked strain hardening behavior by still preserving ductility. While the AHNS reaches a yield strength of nearly 1.9 GPa after 40% cold-work, the AHIS R p0.2 -values range from 1.3 to 1.5 GPa, which can be gradually ranked by the sum of C+N.…”

Section: Tensile Propertiessupporting

confidence: 69%

“…According to empirical relations and thick-thumb rules for wrought austenitic steels, σ D should be at minimum 0.5 times of R p0.2 ( Figure 5) [10,[12][13][14]17,[30][31][32]. Thus, it is interesting to notice that all solution annealed steels (R p0.2 < 700 MPa) nearly fulfill this empirical criterion, while for the cold-worked steels, only 1.4441 and CN0.96 do so up to a yield strength of 1100 MPa (Figure 5).…”

Section: Discussionmentioning

confidence: 99%

“…The fatigue limit in relation to the yield strength of solution-annealed and cold-worked austenitic steels. Own data and those of[10,[12][13][14]17,[30][31][32].…”

mentioning

confidence: 99%

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Fatigue Behavior of Cold-Worked High-Interstitial Steels

Güler

Fischer

2018

Metals

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The austenitic high-nitrogen (AHNS) and high-interstitial steels (AHIS) with more than 0.6 weight-% N allow for a yield strength above 1.1 GPa and a tensile strength above 1.5 GPa by maintaining an elongation to fracture markedly above 30%. These steels gain their prominent mechanical properties from the fact that at the chosen sum of C+N and C/N-ratios, the concentration of free electrons is higher compared to that of other steels. Thus, the capacity to dissipate plastic work under monotonic tensile loading is unique. Now, the fatigue limit of austenitic steels in general is mainly governed by the sum of interstitials and should be further improved by cold working. Unfortunately, this is not the case for the AHNS and AHIS and is in contrast to the classical CrNiC-or CrMnC-steels. Thus, tensile and fatigue tests of cold-worked samples were conducted and analyzed by scanning-and transmission-electron microscopy. This paper tries to elucidate the metallurgical reasons, as well as the material engineering aspects, of such peculiar behavior of AHNS and AHIS.

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Section: Tensile Propertiessupporting

confidence: 69%

Section: Discussionmentioning

confidence: 99%

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Fatigue Behavior of Cold-Worked High-Interstitial Steels

Güler

Fischer

2018

Metals

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“…The nickel can improve the mechanical properties of steel, increase the strength, toughness, heat resistance, the corrosion resistance, acid resistance, and magnetic permeability. Therefore, nickel-plated surface treatment is usually used to improve the surface properties of the material [21,22]. However, the wear resistance of the pure nickel layer is much lower than that of the nickel-based multiple plating layer [23].…”

Section: Introductionmentioning

confidence: 99%

Fabricating the Superhydrophobic Nickel and Improving Its Antifriction Performance by the Laser Surface Texturing

et al. 2019

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The superhydrophobic surface can change the friction property of the material, reduce the adhesion of the friction interface, and produce a certain slip, thereby reducing the friction coefficient. The laser has high energy, high density, and is especially suitable for the surface treatment of materials. The laser surface texturing is a good way to construct superhydrophobic surfaces. The experiment uses a nanosecond pulse laser to construct the groove texture on the nickel surface. The contact area between the air and the droplets retained on the rough surface is increased, effectively preventing the water droplets from entering the gully of the surface microstructure, reducing the water droplets and the solid surface. The contact area ultimately makes the surface exhibit excellent superhydrophobicity. A superhydrophobic nickel surface having an apparent contact angle of water (ACAW) of 160° and a sliding angle (SA) of less than 10° was prepared. The MM-W1B vertical universal friction and wear tester was used to test the groove texture samples with different depths. The surface texture can capture the wear debris generated by the wear and store the lubricant, which is beneficial to the formation of fluid dynamic pressure lubrication and improve the load. The friction coefficient is reduced from 0.65 of the unprocessed surfaces to 0.25 after the texturing, and the friction performance is greatly improved.

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“…High-N austenitic stainless steels (HNASS) have attracted great interest due to their excellent mechanical properties, high N content and absence of the Ni element, compared with common austenitic stainless steels [ 8 , 9 , 10 ]. High-N austenitic stainless steel has been used for implant devices by Yang et al [ 11 ] and Li et al [ 12 ], for example as coronary stent material, showing superior strength and better hem-compatibility. The idea of fabricating HNASS foam could also open up new potential applications in the metal foam area.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Porous High-N Ni-Free Austenitic Stainless Steel Fabricated by Powder Metallurgical Route

Ngai

Peng

et al. 2018

Materials

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Porous high-N Ni-free austenitic stainless steel was fabricated by a powder metallurgical route. The microstructure and properties of the prepared porous austenitic stainless steel were studied. Results reveal that the duplex stainless steel transforms into austenitic stainless steel after nitridation sintering for 2 h. The prepared high-N stainless steel consists of γ-Fe matrix and FCC structured CrN. Worm-shaped and granular-shaped CrN precipitates were observed in the prepared materials. The orientation relationship between CrN and austenite matrix is [011]CrN//[011]γ and (-1-11)CrN//(1-11)γ. Results show that the as-fabricated porous high-nitrogen austenitic stainless steel features a higher mechanical property than common stainless steel foam. Both compressive strength and Young’s modulus decrease with an increase in porosity. The 3D morphology of the prepared porous materials presents good pore connectivity. The prepared porous high-N Ni-free austenitic stainless steel has superior pore connectivity, a good combination of compressive strength and ductility, and low elastic modulus, which makes this porous high-N Ni-free austenitic stainless steel very attractive for metal foam applications.

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Effect of cold deformation on corrosion fatigue behavior of nickel-free high nitrogen austenitic stainless steel for coronary stent application

Cited by 27 publications

References 37 publications

Fatigue Behavior of Cold-Worked High-Interstitial Steels

Fatigue Behavior of Cold-Worked High-Interstitial Steels

Fabricating the Superhydrophobic Nickel and Improving Its Antifriction Performance by the Laser Surface Texturing

Microstructure and Properties of Porous High-N Ni-Free Austenitic Stainless Steel Fabricated by Powder Metallurgical Route

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