Reviews on factors affecting fatigue behavior of high-Mn steels

Kim, Sangshik; Jeong, Daeho; Sung, Hyokyung

doi:10.1007/s12540-017-7459-1

Cited by 39 publications

(7 citation statements)

References 116 publications

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“…As a result, undissolved powder was observed on the surface of all the shaped sculptures, and pores were observed on or near the surface. Generally, the pores of the selective laser melting process include spherical gas pores caused by gas collection due to gas vaporization, keyhole type pores caused by unstable melt pools, and lack of fusion pores caused by unmelted powder and merging pores [21][22][23][24][25][26][27][28]. For the case of pores observed in this study, the lack of fusion pores was determined by the observation of undissolved powder and the pore shape of the surface [28][29][30][31][32][33][34].…”

Section: Resultsmentioning

confidence: 99%

Selective Laser Melting Process for Sensor Embedding into SUS316L with Heat Dissipative Inner Cavity Design

et al. 2021

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Artificial intelligence and Internet of Things (IoT) technology, which are the core of the 4th industrial revolution, can resolve many problems that optimization of production times in the manufacturing process and reduction of materials required etc. In order to utilize the 4th industrial revolution technology, real-time monitoring technology of metal parts is essential, so technology for embedding sensors and IC chips into parts is essential. Using metal 3d printing technology, it is possible to embed IC chips into metal parts, which was impossible because of the existing high-temperature metal manufacturing process of casting or forging. Here we introduce a novel new method for sensor embedding into SUS316L by hemisphere design to avoid direct laser exposure onto sensors during selective laser melting process. Thermal and microstructural analysis was carried out to characterize the property of inner hemisphere for safe thermal couple embedding into SUS316L.

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Section: Resultsmentioning

confidence: 99%

Selective Laser Melting Process for Sensor Embedding into SUS316L with Heat Dissipative Inner Cavity Design

et al. 2021

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“…(A) Sub‐zero temperatures ∆K th data extracted from literature and (B) normalised average ∆K th change at sub‐zero temperatures from 50 datasets reported in literature 52–75 [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Assessment Of the Results Using Data Of Materials Fatiguementioning

confidence: 99%

Extension of the strain energy density method for fatigue assessment of welded joints to sub‐zero temperatures

Braun

Fischer²,

Fricke

et al. 2020

Fatigue Fract Eng Mat Struct

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Within stress-based fatigue assessment concepts, causes that do not influence the fatigue stress parameters, such as temperature, can only be accounted for by means of modification factors. The strain energy density (SED) method allows to account for changing material support effects and Young's modulus with temperature directly. Thus, in this study, a concept is presented to extend the SED method for fatigue assessment of welded joints at sub-zero temperatures. For this purpose, fatigue test results of welded joints made from normal and high-strength structural steel are assessed in the range of 20 C down to −50 C. The results are evaluated based on the formula that is used to derive the SED control radii of welded joints and compared with results of studies on SED-based assessment of notched components at high temperatures. From the estimates of the control radii, a temperature modification function for SED is derived for design purposes.

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“…While effects of high temperatures on material behavior are well covered in international standards and guidelines, there is no comprehensive guidance for sub-zero temperature fatigue strength assessment of welded joints. This is likely related to the small number of publications concerning fatigue of welded steel joints at sub-zero temperatures, see [6][7][8][9][10][11][12][13][14][15][16][17]. Moreover, the majority of studies focuses on fatigue crack growth (FCG) rate testing for cryogenic applications and butt-welded joints.…”

Section: Introductionmentioning

confidence: 99%

Statistical analysis of sub-zero temperature effects on fatigue strength of welded joints

Braun

2021

Weld World

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Ships and offshore structures in Arctic environments are exposed to severe environmental actions and sub-zero temperatures. Thus, the design of such structures has to account for the Arctic environment and must be cost-efficient at the same time. A vital part of the design process is to ensure that fatigue-induced failure does not occur in the lifetime of the structure. While effects of high temperatures on material behavior are well covered in international standards and guidelines, there is no comprehensive guidance for sub-zero temperature fatigue strength assessment. Additionally, stress-life (S–N) test data of welded joints at sub-zero temperatures is particularly scarce. Hence, this study presents an extensive review of recent test results of various weld details tested in the range of − 50 to 20 °C. This data could build the basis for future considerations of temperature effects in fatigue design guidelines and recommendations. For this purpose, the fatigue test results are submitted to a rigorous statistically assessment—including a summary of the limitations of current design guidelines with respect to sub-zero temperature effects.

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Reviews on factors affecting fatigue behavior of high-Mn steels

Cited by 39 publications

References 116 publications

Selective Laser Melting Process for Sensor Embedding into SUS316L with Heat Dissipative Inner Cavity Design

Selective Laser Melting Process for Sensor Embedding into SUS316L with Heat Dissipative Inner Cavity Design

Extension of the strain energy density method for fatigue assessment of welded joints to sub‐zero temperatures

Statistical analysis of sub-zero temperature effects on fatigue strength of welded joints

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