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Fracture and Failure of Advanced Metallic Materials

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A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".

Deadline for manuscript submissions: closed (31 January 2022) | Viewed by 10972

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Special Issue Editor

Dr. Ankit Srivastava

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Guest Editor

Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
Interests: continuum and crystal plasticity; fracture and damage mechanics; environmentally assisted degradation; microstructure characterization; in situ mechanical testing; constitutive modeling; finite element modeling; microstructural material design

Special Issue Information

Dear Colleagues,

In the last century, the field of fracture and failure of metallic materials advanced significantly through the development of theories, computational methods, and experimental techniques and matured as a corrective, diagnostic, and preventive tool. However, with the advent of advanced materials with hierarchical and multiphase microstructures, advanced processing and manufacturing techniques with the possibility to control microstructural features, high resolution material characterization techniques, small scale and in situ experimental techniques, and large‑scale modeling and simulation capabilities, revolutionary advancements in the fracture and failure of metallic materials are required. This is also evident from the fact that despite the rapid advancements in design methodologies in the past few decades there have been relatively fewer efforts aimed at designing metallic materials with targeted fracture and failure properties. This is largely due to the complex microstructures and the deformation, fracture, and failure mechanisms of advanced metallic materials. A microstructure-based characterization and modeling of the fracture and failure of these advanced metallic materials will not only provide a better quality and reliability assessment of components and structures but will also enable fracture- and failure‑oriented microstructural material design. Thus, this Special Issue aspires to follow this line of thought and provide fundamental insights into the microstructure-based physics of the fracture and failure of advanced metallic materials.

Dr. Ankit Srivastava
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

Metallic materials
Metal matrix composites
Quasi-static and dynamic fracture
Localization and instability
Creep
Fatigue
Embrittlement
Mechanical testing
Modeling and simulations
Machine learning

Published Papers (6 papers)

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Research

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13 pages, 2444 KiB

Open AccessArticle

Practical Approbation of Thermodynamic Criteria for the Consolidation of Bimetallic and Functionally Gradient Materials

by Alexander Khaimovich, Yaroslav Erisov, Anton Agapovichev, Igor Shishkovsky, Vitaliy Smelov and Vasilii Razzhivin

Metals 2021, 11(12), 1960; https://doi.org/10.3390/met11121960 - 6 Dec 2021

Cited by 3 | Viewed by 1821

Abstract

This study concerns the key problem of determining the conditions for the consolidation or fracture of bimetallic compounds and high-gradient materials with different coefficients of thermal expansion. The well-known approach to determining the strength is based on the assessment of the critical energy release rates during fracture, depending on the conditions of loading (the portion of shear loading). Unfortunately, most of the experimental results cannot be used directly to select suitable fracture toughness criteria before such a connection is made. This especially applies to the region of interphase interaction, when it is required to estimate the internal energy of destruction accumulated during the preparation of the joint in the adhesion layer within the range of 20–50 μm. Hence, criteria for the adhesive consolidation of bimetallic compound layers were obtained on the basis of the thermodynamics of nonequilibrium processes. The analysis of the quality of the joint using the obtained criteria was carried out on the basis of the calculation of isochoric and isobaric heat capacities and coefficients of thermal expansion of multiphase layers. The applicability of the criteria for the qualitative assessment of the adhesion of layers is demonstrated in the example of bimetallic joints of steel 316L—aluminum alloy AlSi10Mg obtained by the SLM method at various fusion modes. Full article

(This article belongs to the Special Issue Fracture and Failure of Advanced Metallic Materials)

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18 pages, 6919 KiB

Open AccessFeature PaperArticle

Correlating Prior Austenite Grain Microstructure, Microscale Deformation and Fracture of Ultra-High Strength Martensitic Steels

by Xinzhu Zheng, Hassan Ghassemi-Armaki, Karl T. Hartwig and Ankit Srivastava

Metals 2021, 11(7), 1013; https://doi.org/10.3390/met11071013 - 24 Jun 2021

Cited by 5 | Viewed by 2036 | Correction

Abstract

Herein, we correlate the prior austenite grain (PAG) microstructure to deformation and fracture mechanisms of an ultra-high strength martensitic steel. To this end, a low-carbon martensitic steel is subjected to five heat-treatments and the PAG microstructure in the material is reconstructed from the EBSD inverse pole figure maps of the martensitic microstructure. The deformation and fracture response of all heat-treated materials are characterized by in situ tension tests of dog-bone and single-edge notch specimens that allow us to capture both the macroscopic mechanical response and the evolution of microscopic strains via microscale digital image correlation. The experimental results, together with microstructure-based finite element analysis, are then used to elucidate the effect of the PAG microstructure on the mechanical response of the material. Our results show that the interaction between the heterogeneous deformation fields induced by the notch and the bimodal PAG size distribution leads to an increase in the propensity of shear deformation and degradation in the fracture response of the material with increasing heat-treatment temperature and time. Our results also suggest that achieving a unform distribution of fine grains is an effective way to enhance both the strength and fracture properties of this class of materials. Full article

(This article belongs to the Special Issue Fracture and Failure of Advanced Metallic Materials)

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25 pages, 5601 KiB

Open AccessArticle

Microstructure-Based Modeling of the Effect of Inclusion on the Bendability of Advanced High Strength Dual-Phase Steels

by Yu Liu, Dongwei Fan, Raymundo Arróyave and Ankit Srivastava

Metals 2021, 11(3), 431; https://doi.org/10.3390/met11030431 - 5 Mar 2021

Cited by 7 | Viewed by 1924

Abstract

Advanced high strength dual-phase steels are one of the most widely sought-after structural materials for automotive applications. These high strength steels, however, are prone to fracture under bending-dominated manufacturing processes. Experimental observations suggest that the bendability of these steels is sensitive to the presence of subsurface non-metallic inclusions and the inclusions exhibit a rather discrete size effect on the bendability of these steels. Following this, we have carried out a series of microstructure-based finite element calculations of ductile fracture in an advanced high strength dual-phase steel under bending. In the calculations, both the dual-phase microstructure and inclusion are discretely modeled. To gain additional insight, we have also analyzed the effect of an inclusion on the bendability of a single-phase material. In line with the experimental observations, strong inclusion size effect on the bendability of the dual-phase steel naturally emerge in the calculations. Furthermore, supervised machine learning is used to quantify the effects of the multivariable input space associated with the dual-phase microstructure and inclusion on the bendability of the steel. The results of the supervised machine learning are then used to identify the contributions of individual features and isolate critical features that control the bendability of dual-phase steels. Full article

(This article belongs to the Special Issue Fracture and Failure of Advanced Metallic Materials)

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11 pages, 5284 KiB

Open AccessArticle

Effects of Aluminum Foam Filling on Compressive Strength and Energy Absorption of Metallic Y-Shape Cored Sandwich Panel

by Leilei Yan, Pengbo Su, Yagang Han and Bin Han

Metals 2020, 10(12), 1670; https://doi.org/10.3390/met10121670 - 14 Dec 2020

Cited by 4 | Viewed by 1871

Abstract

The design of lightweight sandwich structures with high specific strength and energy absorption capability is valuable for weight sensitive applications. A novel all-metallic foam-filled Y-shape cored sandwich panel was designed and fabricated by using aluminum foam as filling material to prevent core member buckling. Experimental and numerical investigation of out-of-plane compressive loading was carried out on aluminum foam-filled Y-shape sandwich panels to study their compressive properties as well as on empty panels for comparison. The results show that due to aluminum foam filling, the specific structural stiffness, strength, and energy absorption of the Y-shape cored sandwich panel increased noticeably. For the foam-filled panel, aluminum foam can supply sufficient lateral support to the corrugated core and vertical leg of the Y-shaped core and causes a much more complicated deformation mode, which cannot occur in the empty panel. The complicated deformation mode leads to an obvious coupling effect, with the stress–strain curve of the foam-filled panel much higher than those of the empty panel and aluminum foam, which were tested separately. Metallic foam filling is an effective method to increase the specific strength and energy absorption of sandwich structures with lattice cores, making it competitive in load carrying and energy absorption applications. Full article

(This article belongs to the Special Issue Fracture and Failure of Advanced Metallic Materials)

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17 pages, 6783 KiB

Open AccessArticle

Tensile and Fatigue Analysis Based on Microstructure and Strain Distribution for 7075 Aluminum FSW Joints

by Guoqin Sun, Xinhai Wei, Deguang Shang, Shujun Chen, Lianchun Long and Xiuquan Han

Metals 2020, 10(12), 1610; https://doi.org/10.3390/met10121610 - 30 Nov 2020

Cited by 9 | Viewed by 1840

Abstract

In order to study on tensile and fatigue fracture mechanism of friction stir welded (FSW) joints, the tensile and fatigue behavior of FSW joints are studied based on the microstructure and strain distribution. The large plastic deformation and fracture occurred in the thermo-mechanically affected zone (TMAZ) on retreating side in tension tests. High contents of shear texture and small angle grain boundary reduce the tensile mechanical property of TMAZ material. The fatigue weak area for FSW joints is affected by the loading condition. The strain concentration in the welded nugget zone (WNZ) and base material makes the fatigue fracture liable to happen in these areas for the FSW joints under the stress ratios of 0.1 and −0.3. When the fracture occurred in WNZ, the crack initiation mainly occurred in clusters of hardened particles, while when the fracture happened in base material, the crack initiation mainly occurred near the pit. The crack in WNZ propagated in an intergranular pattern and the crack in the other areas extended in a transgranular mode, leading to a higher crack growth rate of WNZ than of other regions. Full article

(This article belongs to the Special Issue Fracture and Failure of Advanced Metallic Materials)

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