S. Ricci, G. Zucca, G. Iannitti, A. Ruggiero, M. Sgambetterra, G. Rizzi, N. Bonora, G. Testa
{"title":"L-PBF AlSi10Mg的非对称和各向异性塑性流动表征","authors":"S. Ricci, G. Zucca, G. Iannitti, A. Ruggiero, M. Sgambetterra, G. Rizzi, N. Bonora, G. Testa","doi":"10.1007/s11340-023-00995-2","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><p>Understanding and predicting the behavior of additively manufactured (AM) parts in real-case scenarios is essential for optimizing the design process. Little literature presents a throughout investigation on the influence of the stress state on the anisotropic response of AM materials, and there has not been a great effort to validate the applicability of conventional material models for AM components.</p><h3>Objective</h3><p>This work aims to assess the effect of building orientation and the stress state on the mechanical response of as-built laser powder bed fusion (L-PBF) AlSi10Mg and to propose, based on the experimental results, a material model able to represent its mechanical response thoroughly.</p><h3>Methods</h3><p>Several mechanical characterization tests, including uniaxial tensile and compressive tests, tensile tests on round-notched bars, and shear tests, were carried out for each investigated building direction (0°, 45°, 90°). The Cazacu-Barlat yield surface was selected to describe the mechanical behavior of the material. Material parameters were identified by inverse calibration and verified using finite element simulation of performed experimental tests.</p><h3>Results</h3><p>The results showed a more consistent effect of the building direction on ductility and maximum stress value, while the effect on yield stress was less significant. Under multiaxial stress states, the anisotropic behavior became less noticeable yet present. No anisotropic behavior was observed under shear conditions. In tension and compression, a slight asymmetry in response was noted. Computational results were found in agreement with the experimental data.</p><h3>Conclusion</h3><p>The influence of both stress state and of the building direction has been systematically investigated by performing several characterization tests on different sample geometries. In combination with mechanical testing, a material model has been proposed and validated to show the applicability of conventional modeling techniques to AM material.</p></div>","PeriodicalId":552,"journal":{"name":"Experimental Mechanics","volume":null,"pages":null},"PeriodicalIF":2.0000,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Characterization of Asymmetric and Anisotropic Plastic Flow of L-PBF AlSi10Mg\",\"authors\":\"S. Ricci, G. Zucca, G. Iannitti, A. Ruggiero, M. Sgambetterra, G. Rizzi, N. Bonora, G. Testa\",\"doi\":\"10.1007/s11340-023-00995-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Background</h3><p>Understanding and predicting the behavior of additively manufactured (AM) parts in real-case scenarios is essential for optimizing the design process. Little literature presents a throughout investigation on the influence of the stress state on the anisotropic response of AM materials, and there has not been a great effort to validate the applicability of conventional material models for AM components.</p><h3>Objective</h3><p>This work aims to assess the effect of building orientation and the stress state on the mechanical response of as-built laser powder bed fusion (L-PBF) AlSi10Mg and to propose, based on the experimental results, a material model able to represent its mechanical response thoroughly.</p><h3>Methods</h3><p>Several mechanical characterization tests, including uniaxial tensile and compressive tests, tensile tests on round-notched bars, and shear tests, were carried out for each investigated building direction (0°, 45°, 90°). The Cazacu-Barlat yield surface was selected to describe the mechanical behavior of the material. Material parameters were identified by inverse calibration and verified using finite element simulation of performed experimental tests.</p><h3>Results</h3><p>The results showed a more consistent effect of the building direction on ductility and maximum stress value, while the effect on yield stress was less significant. Under multiaxial stress states, the anisotropic behavior became less noticeable yet present. No anisotropic behavior was observed under shear conditions. In tension and compression, a slight asymmetry in response was noted. Computational results were found in agreement with the experimental data.</p><h3>Conclusion</h3><p>The influence of both stress state and of the building direction has been systematically investigated by performing several characterization tests on different sample geometries. In combination with mechanical testing, a material model has been proposed and validated to show the applicability of conventional modeling techniques to AM material.</p></div>\",\"PeriodicalId\":552,\"journal\":{\"name\":\"Experimental Mechanics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.0000,\"publicationDate\":\"2023-09-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Experimental Mechanics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11340-023-00995-2\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, CHARACTERIZATION & TESTING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Experimental Mechanics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11340-023-00995-2","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}
Characterization of Asymmetric and Anisotropic Plastic Flow of L-PBF AlSi10Mg
Background
Understanding and predicting the behavior of additively manufactured (AM) parts in real-case scenarios is essential for optimizing the design process. Little literature presents a throughout investigation on the influence of the stress state on the anisotropic response of AM materials, and there has not been a great effort to validate the applicability of conventional material models for AM components.
Objective
This work aims to assess the effect of building orientation and the stress state on the mechanical response of as-built laser powder bed fusion (L-PBF) AlSi10Mg and to propose, based on the experimental results, a material model able to represent its mechanical response thoroughly.
Methods
Several mechanical characterization tests, including uniaxial tensile and compressive tests, tensile tests on round-notched bars, and shear tests, were carried out for each investigated building direction (0°, 45°, 90°). The Cazacu-Barlat yield surface was selected to describe the mechanical behavior of the material. Material parameters were identified by inverse calibration and verified using finite element simulation of performed experimental tests.
Results
The results showed a more consistent effect of the building direction on ductility and maximum stress value, while the effect on yield stress was less significant. Under multiaxial stress states, the anisotropic behavior became less noticeable yet present. No anisotropic behavior was observed under shear conditions. In tension and compression, a slight asymmetry in response was noted. Computational results were found in agreement with the experimental data.
Conclusion
The influence of both stress state and of the building direction has been systematically investigated by performing several characterization tests on different sample geometries. In combination with mechanical testing, a material model has been proposed and validated to show the applicability of conventional modeling techniques to AM material.
期刊介绍:
Experimental Mechanics is the official journal of the Society for Experimental Mechanics that publishes papers in all areas of experimentation including its theoretical and computational analysis. The journal covers research in design and implementation of novel or improved experiments to characterize materials, structures and systems. Articles extending the frontiers of experimental mechanics at large and small scales are particularly welcome.
Coverage extends from research in solid and fluids mechanics to fields at the intersection of disciplines including physics, chemistry and biology. Development of new devices and technologies for metrology applications in a wide range of industrial sectors (e.g., manufacturing, high-performance materials, aerospace, information technology, medicine, energy and environmental technologies) is also covered.