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Residual stress det...
Residual stress determination by neutron diffraction in powder bed fusion-built Alloy 718: Influence of process parameters and post-treatment
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- Goel, Sneha, 1993- (author)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW
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- Neikter, Magnus, 1988- (author)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW
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- Capek, J. (author)
- Paul Scherrer Institut,Paul Scherrer Institute, Laboratory for Neutron Scattering and Imaging, , Villigen PSI, CH-5232, Switzerland (CHE)
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- Polatidis, E. (author)
- Paul Scherrer Institut,Paul Scherrer Institute, Laboratory for Neutron Scattering and Imaging, , Villigen PSI, CH-5232, Switzerland (CHE)
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- Hörnqvist Colliander, Magnus, 1979 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Gothenburg, 41296, Sweden
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- Joshi, Shrikant V., 1960- (author)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW
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- Pederson, Robert, 1973 (author)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW
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(creator_code:org_t)
- Elsevier BV, 2020
- 2020
- English.
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In: Materials and Design. - : Elsevier BV. - 1873-4197 .- 0264-1275. ; 195
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Abstract
Subject headings
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- Alloy 718 is a nickel-based superalloy that is widely used as a structural material for high-temperature applications. One concern that arises when Alloy 718 is manufactured using powder bed fusion (PBF) is that residual stresses appear due to the high thermal gradients. These residual stresses can be detrimental as they can degrade mechanical properties and distort components. In this work, residual stresses in PBF built Alloy 718, using both electron and laser energy sources, were measured by neutron diffraction. The effects of process parameters and thermal post-treatments were studied. The results show that thermal post-treatments effectively reduce the residual stresses present in the material. Moreover, the material built with laser based PBF showed a higher residual stress compared to the material built with electron-beam based PBF. The scanning strategy with the lower amount of residual stresses in case of laser based PBF was the chessboard strategy compared to the bi-directional raster strategy. In addition, the influence of measured and calculated lattice spacing (d0) on the evaluated residual stresses was investigated.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Keyword
- Laser powder bed fusion (LPBF)
- Neutron diffraction
- Electron beam powder bed fusion (EB-PBF)
- Post-treatment
- Residual stresses
- Alloy 718
Publication and Content Type
- art (subject category)
- ref (subject category)
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