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Residual Lattice St...
Residual Lattice Strain and Phase Distribution in Ti-6Al-4V Produced by Electron Beam Melting
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- Maimaitiyili, Tuerdi (author)
- Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM),Photons for Engineering and Manufacturing Group, Paul Scherrer Institute, 5232 Villigen, Switzerland
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- Woracek, Robin (author)
- European Spallation Source ERIC, 22100 Lund, Sweden ; Nuclear Physics Institute of the CAS, 250 68 Husinec—Rež, Czech Republic
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- Neikter, Magnus, 1988- (author)
- Luleå tekniska universitet,Materialvetenskap,Division of Materials Science, Luleå University of Technology, 971 81 Luleå, Sweden
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- Boin, Mirko (author)
- Department of Microstructure and Residual Stress Analysis, Helmholtz-Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany
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- Wimpory, Robert C. (author)
- Department of Microstructure and Residual Stress Analysis, Helmholtz-Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany
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- Pederson, Robert, Professor, 1973- (author)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW,Department of Engineering Science, University West, 46132 Trollhättan, Sweden
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- Strobl, Markus (author)
- European Spallation Source ERIC, 22100 Lund, Sweden ; Nuclear Physics Institute of the CAS, 250 68 Husinec—Rež, Czech Republic ;Neutron Imaging and Applied Materials Group, Paul Scherrer Institute, 5232 Villigen, Switzerland
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- Drakopoulos, Michael (author)
- Imaging and Microscopy Group, Diamond Light Source Ltd., Oxfordshire OX11 0DE, UK
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- Schäfer, Norbert (author)
- Department of Nanoscale Structures and Microscopic Analysis, Helmholtz-Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany
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- Bjerkén, Christina (author)
- Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM)
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(creator_code:org_t)
- 2019-02-23
- 2019
- English.
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In: Materials. - : MDPI. - 1996-1944. ; 12:4
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Abstract
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- Residual stress/strain and microstructure used in additively manufactured material are strongly dependent on process parameter combination. With the aim to better understand and correlate process parameters used in electron beam melting (EBM) of Ti-6Al-4V with resulting phase distributions and residual stress/strains, extensive experimental work has been performed. A large number of polycrystalline Ti-6Al-4V specimens were produced with different optimized EBM process parameter combinations. These specimens were post-sequentially studied by using high-energy X-ray and neutron diffraction. In addition, visible light microscopy, scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD) studies were performed and linked to the other findings. Results show that the influence of scan speed and offset focus on resulting residual strain in a fully dense sample was not significant. In contrast to some previous literature, a uniform α- and β-Ti phase distribution was found in all investigated specimens. Furthermore, no strong strain variations along the build direction with respect to the deposition were found. The magnitude of strain in α and β phase show some variations both in the build plane and along the build direction, which seemed to correlate with the size of the primary β grains. However, no relation was found between measured residual strains in α and β phase. Large primary β grains and texture appear to have a strong effect on X-ray based stress results with relatively small beam size, therefore it is suggested to use a large beam for representative bulk measurements and also to consider the prior β grain size in experimental planning, as well as for mathematical modelling.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Keyword
- residual stress/strain
- electron beam melting
- diffraction
- Ti-6Al-4V
- electron backscattered diffraction
- X-ray diffraction
- Materialteknik
- Engineering Materials
- Produktions- och materialteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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Maimaitiyili, Tu ...
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Woracek, Robin
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Neikter, Magnus, ...
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Boin, Mirko
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Wimpory, Robert ...
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Pederson, Robert ...
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Strobl, Markus
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Drakopoulos, Mic ...
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Schäfer, Norbert
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Bjerkén, Christi ...
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Luleå University of Technology
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University West
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Malmö University