Electron backscatter diffraction characterization of fatigue crack growth in laser metal wire deposited Ti-6Al-4V

Åkerfeldt, PiaLuleå tekniska universitet,Materialvetenskap,Luleå University of Technology,Division of Materials Science, Luleå, Sweden,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU) (författare)

Funders: NFFP (the National Aviation Engineering Research Program)
Validerad;2017;Nivå 2;2017-12-04 (rokbeg)
By additive manufacturing (AM) there is a feasibility of producing near net shape components in basically one step from 3D CAD model to final product. The interest for AM is high and during the past decade a lot of research has been carried out in order to understand the influence from process parameters on the microstructure and furthermore on the mechanical properties. In the present study laser metal wire deposition of Ti-6Al-4V has been studied in detail with regard to its fatigue crack propagation characteristics. Two specimen orientations, parallel and perpendicular to the deposition direction, have been evaluated at room temperature and at 250 Â°C. No difference in the fatigue crack growth rate could be confirmed for the two specimen orientations. However, in the fractographic study it was observed that the tortuosity varied between certain regions on the fracture surface. The local crack path characteristic could be related to the alpha colony size and/or the crystallographic orientation. Moreover, large areas exhibiting similar crystallographic orientation were observed along the prior beta grain boundaries, which were attributed to the wide alpha colonies frequently observed along the prior beta grain boundaries. Â© 2017 Elsevier Inc.

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 hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Materialteknik Metallurgi och metalliska material hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Metallurgy and Metallic Materials hsv//eng
Aluminum; Aluminum alloys; Computer aided design; Crack propagation; Deposition; Fatigue crack propagation; Grain boundaries; Ternary alloys; Titanium alloys; Vanadium alloys
3D CAD Modeling; Crystallographic orientations; Electron back scatter diffraction; Fractographic; Fracture surfaces; Near-net-shape components; Process parameters; Specimen orientation
Cracks
Manufacturing and materials engineering
Produktions- och materialteknik
Materialteknik

Hörnqvist Colliander, Magnus,1979Chalmers University of Technology, Department of Physics, Göteborg, Sweden,Chalmers tekniska högskola(Swepub:cth)magnuh (författare)
Pederson, Robert,1973-Luleå tekniska universitet,Högskolan Väst,Avdelningen för svetsteknologi (SV),Luleå University of Technology,Division of Materials Science, Luleå, Sweden,PTW,Materialvetenskap,Department of Engineering Science, University West,University West,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)(Swepub:cth)pederson (författare)
Antti, Marta-LenaLuleå tekniska universitet,Materialvetenskap,Luleå University of Technology,Division of Materials Science, Luleå, Sweden,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)(Swepub:ltu)marta (författare)
Luleå tekniska universitetMaterialvetenskap (creator_code:org_t)

Ingår i:Materials Characterization: Elsevier BV135, s. 245-2561044-58031873-4189

Av författaren/redakt...: Åkerfeldt, Pia; Hörnqvist Collia ...; Pederson, Robert ...; Antti, Marta-Len ...

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TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Bearbetnings yt ...

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Annan materialte ...

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Metallurgi och m ...

Av lärosätet: Högskolan Väst; Luleå tekniska universitet; Chalmers tekniska högskola

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