Influence of CMT overlay welding mode on the microstructure and mechanical properties of 5087 aluminium alloy fabricated by Wire and Arc Additive Manufacturing

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Influence of CMT overlay welding mode on the microstructure and mechanical properties of 5087 aluminium alloy fabricated by Wire and Arc Additive Manufacturing

Popis výsledku v původním jazyce

Wire and Arc Additive Manufacturing (WAAM) is the most advanced technique used to produce desired parts by layering material. Higher deposition speed, low manufacturing cost and shorter production times are its main benefits. The main limitation of aluminium alloys in the WAAM method is porosity, which directly affects the mechanical properties. Lower heat input in Cold Metal Transfer (CMT) ensures a more stable process, improves welding efficiency and applicability. It can precisely control the back and forth drawing of the welding wire through the closed-loop control system, arc length and droplet flow to accurately control the heat input of the arc welding. Thus, different welding modes of CMT overlay welding were used for production of aluminium alloy walls. The filler wire used for deposition process was 5087 aluminium alloy with diameter of 1.2 mm. It was observed that overlay welding mode possess impact on the microstructure of weld metal. Microstructure of weld metal was formed by dendrites of aluminium solid solution while inter dendrite areas were enriched by alloying elements. Mechanical properties of aluminium alloy deposits were measured by tensile testing. Tensile strength of the samples cut off in the direction of overlay welding and perpendicular to direction of overlay welding was measured. Strain was measured contactless via digital image correlation (DIC) method. Furthermore, microhardness measurements carried out in the walls produced with two different CMT overlay welding modes was conducted. The influence of overlay welding mode on the mechanical properties of produced 5087 aluminium alloy walls was evaluated.

Název v anglickém jazyce

Influence of CMT overlay welding mode on the microstructure and mechanical properties of 5087 aluminium alloy fabricated by Wire and Arc Additive Manufacturing

Popis výsledku anglicky

Wire and Arc Additive Manufacturing (WAAM) is the most advanced technique used to produce desired parts by layering material. Higher deposition speed, low manufacturing cost and shorter production times are its main benefits. The main limitation of aluminium alloys in the WAAM method is porosity, which directly affects the mechanical properties. Lower heat input in Cold Metal Transfer (CMT) ensures a more stable process, improves welding efficiency and applicability. It can precisely control the back and forth drawing of the welding wire through the closed-loop control system, arc length and droplet flow to accurately control the heat input of the arc welding. Thus, different welding modes of CMT overlay welding were used for production of aluminium alloy walls. The filler wire used for deposition process was 5087 aluminium alloy with diameter of 1.2 mm. It was observed that overlay welding mode possess impact on the microstructure of weld metal. Microstructure of weld metal was formed by dendrites of aluminium solid solution while inter dendrite areas were enriched by alloying elements. Mechanical properties of aluminium alloy deposits were measured by tensile testing. Tensile strength of the samples cut off in the direction of overlay welding and perpendicular to direction of overlay welding was measured. Strain was measured contactless via digital image correlation (DIC) method. Furthermore, microhardness measurements carried out in the walls produced with two different CMT overlay welding modes was conducted. The influence of overlay welding mode on the mechanical properties of produced 5087 aluminium alloy walls was evaluated.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 76th IIW Annual Assembly and International Conference

ISBN

978-981-18-7859-6

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

237-244

Název nakladatele

Research Publishing Services

Místo vydání

Singapore

Místo konání akce

Singapur

Datum konání akce

16. 7. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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