Evaluation of tensile properties of thermally aged 316LN stainless steel with varying nitrogen content using ABI technique

Kumar, J. Ganesh; Reddy, G.V. Prasad; George, Alphy; Saikumaran, A.; Mythili, R.; Kumar, P. Anil; Gupta, A.; Vasudevan, M.

doi:10.1016/j.msea.2021.140819

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…The migration and degeneration of the stacking fault throughout the aging process might be the major cause of the twin structures disappearing [23]. The 316 LNSS microstructure shows no visible grain coarsening after 500 h of aging, indicating that the austenite grain structures are highly robust during thermal aging at 750 • C. Furthermore, a small number of second-phase particles [24] (black dots) are scattered throughout the grains of 316 LNSS (see Figure 1b-f). However, the properties of precipitates and their evolution behaviors cannot be observed using an optical microscope due to resolution constraints.…”

Section: Microscopic Structures Observation Under Ommentioning

confidence: 99%

Effect of Microstructure on Mechanical Properties of 316 LN Austenitic Stainless Steel

2022

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The microstructure development of 316 LN austenitic stainless steel (316 LNSS) during the aging process is investigated in this article. The thermal aging processes were conducted at 750 °C with different periods ranging from 50 to 500 h. The metallographic results show that the coherent and incoherent twins were present in the original 316 LNSS grains, but dwindled as the aging period increased. After 50 h of aging, many fine, dispersed particles precipitated from the matrix, which were identified as M23C6 by energy dispersive spectrometer (EDS) and transmission electron microscopy (TEM). Additionally, the impact toughness and Brinell hardness (HBW) changed during the aging, which was closely related to the effects of dispersion strengthening and solution strengthening. A negatively linear relationship between Brinell hardness and Charpy impact energy was established, which could be utilized to predict the degree of thermal embrittlement.

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Section: Microscopic Structures Observation Under Ommentioning

confidence: 99%

Effect of Microstructure on Mechanical Properties of 316 LN Austenitic Stainless Steel

2022

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“…[ 22–27 ] Introducing nanoparticles with excellent thermostability, high melting point, ultrahigh hardness, high chemical stability, and relatively low density to steel is a proven and effective method for the preparation of high‐performance steel. [ 27–31 ] Wang [ 32 ] reported that nano‐TiC ceramic particles can serve as the core of the austenite and prevent austenite from growth attributed to the similar lattice with austenite (face‐centered cubic lattice), which is a coherent relationship with austenite. Although the addition of nano‐TiC particles has various advantages, problems remain when adding the particles, including floating, agglomeration, and surface contamination of nano‐TiC particles.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano‐TiC Ceramic Particles on Microstructures and Properties of High‐Cr Steel under Different Heat‐Treatment Conditions

Chang

Shu

et al. 2023

Adv Eng Mater

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In order to improve the service life of die steels, many methods have been used to improve their properties. However, some properties may be weakened after different heat treatments. In this study, a novel method of nanoparticle treatment was used to improve the service performance of high Cr steel, and the effect of nano‐TiC ceramic particles on its microstructures and properties under different heat treatment conditions was investigated. After forging and isothermal spheroidization, the nano‐TiC ceramic particles treatment high Cr steel has a mixed grain with equiaxed grain and striated grain. Under different heat treatment conditions, the nano‐TiC reinforced high Cr steel has refined martensite laths, carbides, and a higher content of retained austenite. In contrast, the nano‐TiC ceramic particles reinforced high Cr steel have higher strength and strain, the yield strength (σ0.2), tensile strength (σb), fracture strain, product of strength and strain, and impact toughness of HCS‐51 (HCSN‐51), are 1349 MPa (1531 MPa), 1662 MPa (1770 MPa), 9.4% (12.1%), 12405 MPa·% (18766 MPa·%) and 266 J/cm2 (445 J/cm2), which is 13.5%, 6.5%, 28.7%, 51.3% and 67.3% higher, respectively. The primary strengthening mechanisms included fine‐grain strengthening and precipitation strengthening. The main toughness mechanism was fine‐grain and transformation‐induced plasticity.This article is protected by copyright. All rights reserved.

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Contiguous hetero-structures and co-existing morphological derivatives of preferentially grown carbo-nitrides in long-term aged SS 316LN with varying nitrogen concentration

et al. 2022

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Evaluation of tensile properties of thermally aged 316LN stainless steel with varying nitrogen content using ABI technique

Cited by 7 publications

References 22 publications

Effect of Microstructure on Mechanical Properties of 316 LN Austenitic Stainless Steel

Effect of Microstructure on Mechanical Properties of 316 LN Austenitic Stainless Steel

Effect of Nano‐TiC Ceramic Particles on Microstructures and Properties of High‐Cr Steel under Different Heat‐Treatment Conditions

Contiguous hetero-structures and co-existing morphological derivatives of preferentially grown carbo-nitrides in long-term aged SS 316LN with varying nitrogen concentration

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