Comparative Study of Microstructure-sensitive Fatigue Crack Propagation in Coarse- and Fine-grained Microstructures between Stable and Metastable Austenitic Stainless Steels Using Miniature Specimen

Matsushita, A.; Ueki, Shohei; Mine, Yoji; Takashima, Kazuki

doi:10.2355/isijinternational.isijint-2020-659

Cited by 9 publications

(2 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, over the past decades, an alternative technique, named as “miniaturized testing”, had been evolved as a non-invasive approach to obtain material property for structural integrity evaluation. In order to maximize the diversity of measured mechanical properties and minimize the cost, significant efforts have been made to develop a substantial variety of miniature testing, from which a series of various properties can be derived, such as tensile (Zhang et al ., 2021; Zhong et al ., 2019; Janča et al ., 2016), fatigue (Lancaster et al ., 2019; Nogami et al ., 2013, 2017), fracture toughness (Hurst et al ., 2019; Kumar et al ., 2017; Arroyo et al ., 2019), fatigue crack growth (Matsushita et al ., 2021; Wan et al ., 2019b) etc.…”

Section: Introductionmentioning

confidence: 99%

Analytical and inverse method for determining high temperature properties of materials using small punch creep: a review

Liu

et al. 2023

MMMS

View full text Add to dashboard Cite

PurposeThis paper presents a review concerning the analytical and inverse methods of small punch creep test (SPCT) in order to evaluate the mechanical property of component material at elevated temperature.Design/methodology/approachIn this work, the effects of temperature, specimen size and shape on material properties are mainly discussed using the finite element (FE) method. The analytical approaches including membrane stretching, empirical or semi-empirical solutions that are currently used for data interpretation have been presented.FindingsThe state-of-the-art research progress on the inverse method, such as non-linear optimization program and neutral network, is critically reviewed. The capabilities of the inverse technique, the uniqueness of the solution and future development are discussed.Originality/valueThe state-of-the-art research progress on the inverse method such as non-linear optimization program and neutral network is critically reviewed. The capabilities of the inverse technique, the uniqueness of the solution and future development are discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Analytical and inverse method for determining high temperature properties of materials using small punch creep: a review

Liu

et al. 2023

MMMS

View full text Add to dashboard Cite

show abstract

“…In recent decades, researchers have strived to understand fatigue mechanisms better and develop fatigue life prediction methods by considering various length scales of crack growth mechanics. [1][2][3][4][5][6] There are different definitions for the length scales of fatigue crack due to its variable growth characteristics among multiple spatial length scales. For instance, Miller 7,8) described the crack length scales as three regimes: (i) the microstructurally short crack (SC), (ii) the physically short crack (PSC), and (iii) the mechanically long crack (LC).…”

Section: Introductionmentioning

confidence: 99%

Applicability of the Multiscale Model for Predicting Fatigue Strength to Short and Long Crack Problems

et al. 2022

View full text Add to dashboard Cite

A multiscale model based on micromechanics of short crack growth has been proposed and proved to be able to predict the fatigue strength of steels via experiments with thin specimens in our previous work. The present study aims to validate the applicability of our model in predicting fatigue strength in long crack problems. A camera with high resolution was set up and successfully captured the crack growth process during the fatigue test. Very good agreements for both fatigue life and crack growth process were demonstrated by comparing the experimental results and the predictions from the proposed model, indicating that our model can be served as a generalised foundation to accurately predict the fatigue behaviours of ferrite-pearlite steel for both the short and long crack growth problems.

show abstract

Understanding crack growth within the γ′ Fe4N layer in a nitrided low carbon steel during monotonic and cyclic tensile testing

Varanasi,

Koyama,

Yokoi

et al. 2024

J Mater Sci

View full text Add to dashboard Cite

Nitriding is a cost-effective method to realize simultaneous improvements in tensile and fatigue properties and resistance to abrasion and corrosion. Previous studies reported that nitriding pure Fe enhances tensile strength by ~ 70% and fatigue limit by ~ 200%. It is due to the increase in surface hardness caused by the formation of γ′(Fe4N) and ε(Fe2-3N) nitrogen-containing intermetallic compound phases. However, the intermetallic compound layer is prone to brittle-like cracking. To better design nitrided steels, it is crucial to identify the crack growth mechanisms via analysis of the microstructural crack growth paths within the ~ 4–6 µm thick nitride layer. In the current work, we statistically evaluate the crack propagation behavior in the γ′ Fe4N layer during monotonic and cyclic tensile deformation in nitrided low-carbon steel (0.1 wt% C). Since nitriding typically results in the formation of columnar grains, the effect of morphology needs to be clarified. To this end, the steel was shot-peened and subsequently nitrided to promote equiaxed nitride grains morphology (~ 16% increase). Crack growth paths were comparatively evaluated for multiple cracks, and no significant effect of nitride morphology was observed. {100}γ′ is the predominant transgranular crack path in the monotonic tensile tested specimen, followed by {111}γ′. It is despite the elastic modulus of {111}γ′ < {100}γ′. This contrary behavior is explained by {100}γ′ plane having the lowest surface energy (density functional theory calculations). In the cyclic tensile loaded specimen, experiments revealed that transgranular cracking along {100}γ′ (cracking via symmetric dislocation emission) or {111}γ′ (slip plane cracking) is equally likely. Graphical abstract

show abstract

Comparative Study of Microstructure-sensitive Fatigue Crack Propagation in Coarse- and Fine-grained Microstructures between Stable and Metastable Austenitic Stainless Steels Using Miniature Specimen

Cited by 9 publications

References 35 publications

Analytical and inverse method for determining high temperature properties of materials using small punch creep: a review

Analytical and inverse method for determining high temperature properties of materials using small punch creep: a review

Applicability of the Multiscale Model for Predicting Fatigue Strength to Short and Long Crack Problems

Understanding crack growth within the γ′ Fe4N layer in a nitrided low carbon steel during monotonic and cyclic tensile testing

Contact Info

Product

Resources

About