Nanoindentation creep deformation behaviour of high nitrogen nickel-free austenitic stainless steel

Zhang, Xiaoru; Sun, Shicheng; Sun, Guixun; Han, Shuang; Jiang, Zhonghao; Lian, Jianshe

doi:10.1080/02670836.2019.1631947

Cited by 6 publications

(2 citation statements)

References 37 publications

(65 reference statements)

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“…The creep resistance of materials can be evaluated using a creep stress exponent ( n ). The higher the nanoindentation creep exponent is, the higher the creep resistance [ 24 ]. There are other results published worth noting in this context, considering the representability of n and its high values typical to Berkovich tip.…”

Section: Introductionmentioning

confidence: 99%

Nano-Mechanical Behavior of Ti6Al4V Alloy Manufactured Using Laser Powder Bed Fusion

et al. 2023

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The microstructure of Ti6Al4V alloy, manufactured using laser powder bed fusion (L-PBF), is affected by process parameters and heat treatment. However, their influence on the nano-mechanical behavior of this widely applicable alloy is still unknown and scarcely reported. This study aims to investigate the influence of the frequently used annealing heat treatment on mechanical properties, strain-rate sensitivity, and creep behavior of L-PBF Ti6Al4V alloy. Furthermore, the influence of different utilized L-PBF laser power–scanning speed combinations on mechanical properties of annealed specimens has been studied as well. It has been found that the effect of high laser power remains present in the microstructure even after annealing, resulting in increase in nano-hardness. Moreover, the linear relation between the Young’s modulus and the nano-hardness after annealing has been established. Thorough creep analysis revealed dislocation motion as a dominant deformation mechanism, both for as-built and annealed conditions of the specimens. Although annealing heat treatment is beneficial and widely recommended, it reduces the creep resistance of Ti6Al4V alloy manufactured using L-PBF. The results presented within this research article contribute to the L-PBF process parameter selection, as well as to understanding the creep behavior of these novel and widely applicable materials.

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Section: Introductionmentioning

confidence: 99%

Nano-Mechanical Behavior of Ti6Al4V Alloy Manufactured Using Laser Powder Bed Fusion

et al. 2023

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“…High-nitrogen austenitic stainless steel (HNSS) can be used for non-magnetic drill collars in oil exploitation, bearing steels for automobile industry, and many other applications due to its excellent properties, i.e., high strength, good ductility, and superior corrosion resistance [1][2][3][4][5][6]. However, because of harsh service conditions, such as high temperature, heavy load, and high velocity, the demand for surface hardness and wear resistance is enhanced [7,8].…”

Section: Introductionmentioning

confidence: 99%

Friction and Wear Behaviors of Fe-19Cr-15Mn-0.66N Steel at High Temperature

et al. 2021

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The friction and wear behaviors of Fe-19Cr-15Mn-0.66N steel were investigated under applied loads of 5 N and 15 N at the wear-testing temperatures of 300 °C and 500 °C using a ball-on-disc tribometer. The wear tracks were evaluated by scanning electron microscopy (SEM) and laser scanning confocal microscopy (LSCM) to reveal the variation in morphologies. Energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) were used to determine the components of oxide layers formed on wear surfaces. The results demonstrated that the oxide layers are favorable for obtaining a low friction coefficient under all conditions. The average friction coefficient decreased with increasing load at 300 °C, while it increased with the increase in applied load at 500 °C. At 300 °C, severe abrasive wear characterized by grooves resulted in a high friction coefficient with 5 N applied, whereas the formation of a denser oxide layer consisting of Cr2O3, FeCr2O4, Fe2O3, etc., and the increased hardness caused by work hardening led to a decrease in friction characterized by mild adhesive wear. At 500 °C, the transformation of Fe2O3 to the relatively softer Fe3O4 and the high production of lubricating Mn2O3 resulted in a minimum average friction coefficient (0.34) when 5 N was applied. However, the softening caused by high temperature weakened the hardening effect, and thus the friction coefficient increased with 15 N applied at 500 °C.

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Nanoindentation mechanical properties of U-5.5 wt%Nb treated by continuous electron beam surface remelting

Liu

et al. 2022

Journal of Alloys and Compounds

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Nanoindentation creep deformation behaviour of high nitrogen nickel-free austenitic stainless steel

Cited by 6 publications

References 37 publications

Nano-Mechanical Behavior of Ti6Al4V Alloy Manufactured Using Laser Powder Bed Fusion

Nano-Mechanical Behavior of Ti6Al4V Alloy Manufactured Using Laser Powder Bed Fusion

Friction and Wear Behaviors of Fe-19Cr-15Mn-0.66N Steel at High Temperature

Nanoindentation mechanical properties of U-5.5 wt%Nb treated by continuous electron beam surface remelting

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