Experimental and numerical two- and three-dimensional investigation of porosity morphology of the sintered metallic material

Madej, Łukasz; Legwand, Adam; Mojżeszko, Mateusz; Chrapoński, Jacek; Roskosz, S.; Cwajna, Jan

doi:10.1016/j.acme.2018.06.007

Cited by 10 publications

(4 citation statements)

References 17 publications

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“…For highly heterogeneous materials, the mechanical properties can also be analysed by this method as long as artificial RVE generation approaches. 36–39…”

Section: Discussionmentioning

confidence: 99%

In situ nanoindentation method for characterizing tensile properties of AISI 1045 steel based on mesomechanical analysis

Zhao

Sun

et al. 2019

Advances in Mechanical Engineering

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A novel method for characterizing the tensile properties of AISI 1045 steel is proposed by combining the method of in situ nanoindentation test and the theory of mesomechanical analysis. First, the load–depth curves of exact location of ferrite, pearlite and grain boundary on the surface of AISI 1045 steel are obtained by 30 groups of in situ nanoindentation tests. The constitutive equation (stress–strain function) of the real-time metallographic structure is obtained by nanoindentation analysis of the above curves. Then, based on the principle of mesomechanical analysis, the computational representative volume element models are reconstructed according to the three metallographic images of AISI 1045 steel surface collected by the test equipment. Finally, taking the constitutive equation of the real-time metallographic structure as the input condition, the finite element analysis of the above representative volume element models are carried out. The data resulted from finite element analysis are taken as the tensile mechanical properties of AISI 1045 steel. The elastic modulus of AISI 1045 steel calculated is as the same as that by the traditional nanoindentation method. And, the error is less than 6% compared with the tensile test, which is within the range of the elastic modulus of the material. The error between the yield strength calculated and tensile test results is 3.4%. Due to the influence of surface cracks on the plastic deformation ability of AISI 1045 steel during tension, the error between the strain hardening index calculated and tensile test results is 7.4%. The results show that it is a more accurate nondestructive testing method in the point of material damage mechanism. On the premise of using more accurate representative volume element modelling way, this method is suitable for testing more materials.

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“…For highly heterogeneous materials, the mechanical properties can also be analysed by this method as long as artificial RVE generation approaches. 36–39…”

Section: Discussionmentioning

confidence: 99%

In situ nanoindentation method for characterizing tensile properties of AISI 1045 steel based on mesomechanical analysis

Zhao

Sun

et al. 2019

Advances in Mechanical Engineering

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“…Therefore, three sets of 60 images of microstructure morphology from subsequent depths (up to approx. 34.20 μm) were obtained and subjected to image processing with in-house 3D reconstruction algorithms [24]. As a result, a complete 3D representation of the investigated microstructure was obtained, as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of capabilities of the nanoindentation test in the determination of flow stress characteristics of the matrix material in porous sinters

Madej

Legwand

Setty

et al. 2021

Archiv.Civ.Mech.Eng

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Herein, we evaluate the nanoindentation test capabilities in the determination of flow stress characteristics of the matrix material in porous sinters. The Distaloy AB sample with 15% porosity after the sintering operation is selected as a case study for the investigation. 2D and 3D imaging techniques are employed first to highlight difficulties in identifying reliable nano hardness measurement zones for further properties evaluation. Then, nanoindentation test results are acquired with Berkovich tip pressed under various loads at different locations in the sample. Systematic indentations in the quartz sample are used as a cleaning procedure to minimize the effect of the possible build-up around the indenter tip. The representative indentation load range is selected based on the extracted material characteristics. With that, the stress–strain response of the sinter matrix material is identified. The reliability of the determined flow stress curve is confirmed with the use of conical nanoindentation measurement results and finite element simulations. Obtained results show that it is possible to calculate reliable flow stress characteristics of the matrix in the porous samples, with the assumption that experiments under various loading conditions and from various locations in the matrix are performed. It is also pointed out that various indentation loads should be used to eliminate the influence of the pile-up or scale effects that affect the overall material response.

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“…A large number of programs and algorithms have been created to generate digital microstructures using, e.g. image analysis techniques [11], Voronoi tessellation [12,13], cellular automata (CA) [14,15], Monte Carlo (MC) [16,17], Molecular Dynamics (MD) [18], numerical homogenization [19,20] or a combination of these approaches. A detailed review of various mentioned numerical solutions was presented in the author's earlier work [21].…”

Section: Motivationmentioning

confidence: 99%

“…14. Details on laborious serial sectioning procedure along with the 3D reconstruction algorithms are presented in earlier authors' research [15,31]. The use of the developed CA library and the workflow concept can provide statistically similar digital models characterized by, e.g.…”

Section: Algorithms For Flexible Generation Of Heterogenous Microstrumentioning

confidence: 99%

Cellular Automata-based computational library for development of digital material representation models of heterogenous microstructures

Boguń

Sitko

Mojżeszko

et al. 2021

Archiv.Civ.Mech.Eng

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The development of an efficient numerical approach for the generation of a wide range of heterogeneous microstructures models with the application of the lean workflow concept is presented in the paper. First, the idea and implementation details of the developed cellular automata-based computational library allowing the development of digital material representation models within a workflow are presented in the paper. Such an approach provides the desired flexibility in the generation of various digital models of heterogenous microstructures. Therefore, the proposed library is mostly implemented within the object-oriented C + + programming language with the assumption of modularity. In this case, the main part of the application consists of classes and methods, which can be treated like base elements to be inherited and extended in other libraries. Each additional dynamic link library implements particular algorithms for the generation of specific microstructure features in the digital model within the unified data structures that allow the application of the workflow concept. The set of developed libraries and their assumptions are described as case studies to show the capabilities of the presented solution. Finally, examples of practical applications of the developed library in the full-field numerical simulations of complex material deformation are presented at the end of the paper.

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Experimental and numerical two- and three-dimensional investigation of porosity morphology of the sintered metallic material

Cited by 10 publications

References 17 publications

In situ nanoindentation method for characterizing tensile properties of AISI 1045 steel based on mesomechanical analysis

In situ nanoindentation method for characterizing tensile properties of AISI 1045 steel based on mesomechanical analysis

Evaluation of capabilities of the nanoindentation test in the determination of flow stress characteristics of the matrix material in porous sinters

Cellular Automata-based computational library for development of digital material representation models of heterogenous microstructures

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