Numerical modeling and synchrotron diffraction measurements of residual stresses in laser powder bed fusion manufactured alloy 625

Malmelöv, Andreas (author): Luleå University of Technology,Luleå tekniska universitet,Hållfasthetslära,Lulea Univ Technol, Mech Solid Mat, SE-97187 Lulea, Sweden.

Hassila, Carl Johan (author): Uppsala universitet,Uppsala University,Tillämpad materialvetenskap

Fisk, Martin, 1981- (author): Malmö University,Lund University,Lunds universitet,Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM),Materials Science and Applied Mathematics, Malmö University, SE-205 06 Malmö, Sweden; Division of Solid Mechanics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden,Hållfasthetslära,Institutionen för byggvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Solid Mechanics,Department of Construction Sciences,Departments at LTH,Faculty of Engineering, LTH,Malmö Univ, Mat Sci & Appl Math, SE-20506 Malmö, Sweden.;Lund Univ, Div Solid Mech, POB 118, SE-22100 Lund, Sweden.

Wiklund, Urban (author): Uppsala universitet,Uppsala University,Tillämpad materialvetenskap

Lundbäck, Andreas (author): Luleå University of Technology,Luleå tekniska universitet,Hållfasthetslära,Lulea Univ Technol, Mech Solid Mat, SE-97187 Lulea, Sweden.

(creator_code:org_t)

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Abstract Subject headings

Residual stresses in metal additive manufactured components are a well-known problem. It causes distortion of the samples when removing them from the build plate, as well as acting detrimental with regard to fatigue. The understanding of how residual stresses in a printed sample are affected by process parameters is crucial to allow manufacturers to tune their process parameters, or the design of their component, to limit the negative influence of residual stresses. In this paper, residual stresses in additive manufactured samples are simulated using a thermo-mechanical finite element model. The elasto-plastic behavior of the material is described by a mechanism-based material model that accounts for microstructural and relaxation effects. The heat source in the finite element model is calibrated by fitting the model to experimental data. The residual stress field from the finite element model is compared with experimental results attained from synchrotron X-ray diffraction measurements. The results from the model and measurement give the same trend in the residual stress field. In addition, it is shown that there is no significant difference in trend and magnitude of the resulting residual stresses for an alternation in laser power and scanning speed.

TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)

By the author/editor: Malmelöv, Andrea ...; Hassila, Carl Jo ...; Fisk, Martin, 19 ...; Wiklund, Urban; Lundbäck, Andrea ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Applied Mechanic ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Manufacturing Su ...

By the university: Luleå University of Technology; Malmö University; Lund University; Uppsala University

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