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Microstructure, mec...
Microstructure, mechanical properties and fracture mechanisms in a 7017 aluminium alloy tailored for powder bed fusion – laser beam
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- Mehta, Bharat, 1993 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Mishurova, T. (författare)
- Bundesanstalt für Materialforschung und -prüfung (BAM),Federal Institute for Materials Research and Testing
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- Evsevleev, S. (författare)
- Bundesanstalt für Materialforschung und -prüfung (BAM),Federal Institute for Materials Research and Testing
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- Markötter, Henning (författare)
- Bundesanstalt für Materialforschung und -prüfung (BAM),Federal Institute for Materials Research and Testing
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- Bruno, G. (författare)
- Bundesanstalt für Materialforschung und -prüfung (BAM),Federal Institute for Materials Research and Testing
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- Hryha, Eduard, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Nyborg, Lars, 1958 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Virtanen, Eero (författare)
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(creator_code:org_t)
- Elsevier BV, 2023
- 2023
- Engelska.
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Ingår i: Materials and Design. - : Elsevier BV. - 1873-4197 .- 0264-1275. ; 226
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- This study addressed a 7017 Al-alloy tailored for powder bed fusion – laser beam (PBF-LB) process. The alloy was prepared by mixing 3 wt% Zr and 0.5 wt% TiC powder to standard pre-alloyed 7017 grade aluminium powder. This made printing of the alloys possible avoiding solidification cracking in the bulk and achieving high relative density (99.8 %). Such advanced alloys have significantly higher Young's modulus (>80 GPa) than conventional Al-alloys (70–75 GPa), thus making them attractive for applications requiring high stiffness. The resulting microstructure in as-printed condition was rich in particles originating from admixed powders and primary precipitates/inclusions originating from the PBF-LB process. After performing a T6-like heat treatment designed for the PBF-LB process, the microstructure changed: Zr-nanoparticles and Fe- or Mg/Zn- containing precipitates formed thus providing 75 % increase in yield strength (from 254 MPa to 444 MPa) at the cost of decreasing ductility (∼20 % to ∼9 %). In-situ tensile testing combined with SXCT, and ex-situ tensile testing combined with fracture analysis confirmed that the fracture initiation in both conditions is highly dependent on defects originated during printing. However, cracks are deflected from decohesion around Zr-containing inclusions/precipitates embedded in the Al-matrix. This deflection is seen to improve the ductility of the material.
Ämnesord
- 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 -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Nyckelord
- Powder bed fusion – Laser beam
- Strengthening mechanisms
- Zirconium
- Crack propagation
- X-ray computed tomography
- Additive manufacturing
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Mehta, Bharat, 1 ...
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Mishurova, T.
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Evsevleev, S.
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Markötter, Henni ...
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Bruno, G.
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Hryha, Eduard, 1 ...
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visa fler...
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Nyborg, Lars, 19 ...
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Virtanen, Eero
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visa färre...
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Materialteknik
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Materialteknik
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och Annan materialte ...
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Materialteknik
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och Metallurgi och m ...
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Materials and De ...
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Chalmers tekniska högskola