Welding abilities of UFG metals

Davide Campanella, Gianluca Buffa, Livan Fratini, Lech Olejnik, Lukasz Morawiński, Tomasz Chmielewski

Risultato della ricerca: Other

4 Citazioni (Scopus)

Abstract

Ultrafine Grained (UFG) metals are characterized by an average grain size of <1 μm and mostly high angle grain boundaries. These materials exhibit exceptional improvements in strength, superplastic behaviour and in some cases enhanced biocompatibility. UFG metals barstock can be fabricated effectively by means of Severe Plastic Deformation (SPD) methods. However, the obtained welded joints with similar properties to the base of UFG material are crucial for the production of finished engineering components. Conventional welding methods based on local melting of the joined edges cannot be used due to the UFG microstructure degradation caused by the heat occurrence in the heat affected zone. Therefore, the possibility of obtaining UFG materials joints with different shearing plane (SP) positions by means of friction welded processes, which do not exceed the melting temperature during the process, should be investigated. The article focuses on the Linear Friction Welding (LFW) method, which belongs to innovative welding processes based on mixing of the friction-heated material in the solid state. LFW is a welding process used to joint bulk components. In the process, the friction forces work due to the high frequency oscillation and the pressure between the specimens is converted in thermal energy. Character and range of recrystallization can be controlled by changing LFW parameters. Experimental study on the welded UFG 1070 aluminum alloy by means of FLW method, indicates the possibility of reducing the UFG structure degradation in the obtained joint. A laboratory designed LFW machine has been used to weld the specimens with different contact pressure and oscillation frequency.
Lingua originaleEnglish
Pagine0500121-0500126
Numero di pagine6
Stato di pubblicazionePublished - 2018

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friction welding
welding
friction
metals
welding machines
melting
degradation
welded joints
oscillations
heat affected zone
biocompatibility
shearing
thermal energy
aluminum alloys
plastic deformation
grain boundaries
grain size
engineering
occurrences
solid state

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cita questo

Campanella, D., Buffa, G., Fratini, L., Olejnik, L., Morawiński, L., & Chmielewski, T. (2018). Welding abilities of UFG metals. 0500121-0500126.

Welding abilities of UFG metals. / Campanella, Davide; Buffa, Gianluca; Fratini, Livan; Olejnik, Lech; Morawiński, Lukasz; Chmielewski, Tomasz.

2018. 0500121-0500126.

Risultato della ricerca: Other

Campanella, D, Buffa, G, Fratini, L, Olejnik, L, Morawiński, L & Chmielewski, T 2018, 'Welding abilities of UFG metals', pagg. 0500121-0500126.
Campanella D, Buffa G, Fratini L, Olejnik L, Morawiński L, Chmielewski T. Welding abilities of UFG metals. 2018.
Campanella, Davide ; Buffa, Gianluca ; Fratini, Livan ; Olejnik, Lech ; Morawiński, Lukasz ; Chmielewski, Tomasz. / Welding abilities of UFG metals. 6 pag.
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abstract = "Ultrafine Grained (UFG) metals are characterized by an average grain size of <1 μm and mostly high angle grain boundaries. These materials exhibit exceptional improvements in strength, superplastic behaviour and in some cases enhanced biocompatibility. UFG metals barstock can be fabricated effectively by means of Severe Plastic Deformation (SPD) methods. However, the obtained welded joints with similar properties to the base of UFG material are crucial for the production of finished engineering components. Conventional welding methods based on local melting of the joined edges cannot be used due to the UFG microstructure degradation caused by the heat occurrence in the heat affected zone. Therefore, the possibility of obtaining UFG materials joints with different shearing plane (SP) positions by means of friction welded processes, which do not exceed the melting temperature during the process, should be investigated. The article focuses on the Linear Friction Welding (LFW) method, which belongs to innovative welding processes based on mixing of the friction-heated material in the solid state. LFW is a welding process used to joint bulk components. In the process, the friction forces work due to the high frequency oscillation and the pressure between the specimens is converted in thermal energy. Character and range of recrystallization can be controlled by changing LFW parameters. Experimental study on the welded UFG 1070 aluminum alloy by means of FLW method, indicates the possibility of reducing the UFG structure degradation in the obtained joint. A laboratory designed LFW machine has been used to weld the specimens with different contact pressure and oscillation frequency.",
keywords = "Friction Stir Welding (FSW), Linear Friction Welding (LFW), Rotary Friction Welding (RFW), Severe Plastic Deformation (SPD), Ultrafine Grained (UFG)",
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T1 - Welding abilities of UFG metals

AU - Campanella, Davide

AU - Buffa, Gianluca

AU - Fratini, Livan

AU - Olejnik, Lech

AU - Morawiński, Lukasz

AU - Chmielewski, Tomasz

PY - 2018

Y1 - 2018

N2 - Ultrafine Grained (UFG) metals are characterized by an average grain size of <1 μm and mostly high angle grain boundaries. These materials exhibit exceptional improvements in strength, superplastic behaviour and in some cases enhanced biocompatibility. UFG metals barstock can be fabricated effectively by means of Severe Plastic Deformation (SPD) methods. However, the obtained welded joints with similar properties to the base of UFG material are crucial for the production of finished engineering components. Conventional welding methods based on local melting of the joined edges cannot be used due to the UFG microstructure degradation caused by the heat occurrence in the heat affected zone. Therefore, the possibility of obtaining UFG materials joints with different shearing plane (SP) positions by means of friction welded processes, which do not exceed the melting temperature during the process, should be investigated. The article focuses on the Linear Friction Welding (LFW) method, which belongs to innovative welding processes based on mixing of the friction-heated material in the solid state. LFW is a welding process used to joint bulk components. In the process, the friction forces work due to the high frequency oscillation and the pressure between the specimens is converted in thermal energy. Character and range of recrystallization can be controlled by changing LFW parameters. Experimental study on the welded UFG 1070 aluminum alloy by means of FLW method, indicates the possibility of reducing the UFG structure degradation in the obtained joint. A laboratory designed LFW machine has been used to weld the specimens with different contact pressure and oscillation frequency.

AB - Ultrafine Grained (UFG) metals are characterized by an average grain size of <1 μm and mostly high angle grain boundaries. These materials exhibit exceptional improvements in strength, superplastic behaviour and in some cases enhanced biocompatibility. UFG metals barstock can be fabricated effectively by means of Severe Plastic Deformation (SPD) methods. However, the obtained welded joints with similar properties to the base of UFG material are crucial for the production of finished engineering components. Conventional welding methods based on local melting of the joined edges cannot be used due to the UFG microstructure degradation caused by the heat occurrence in the heat affected zone. Therefore, the possibility of obtaining UFG materials joints with different shearing plane (SP) positions by means of friction welded processes, which do not exceed the melting temperature during the process, should be investigated. The article focuses on the Linear Friction Welding (LFW) method, which belongs to innovative welding processes based on mixing of the friction-heated material in the solid state. LFW is a welding process used to joint bulk components. In the process, the friction forces work due to the high frequency oscillation and the pressure between the specimens is converted in thermal energy. Character and range of recrystallization can be controlled by changing LFW parameters. Experimental study on the welded UFG 1070 aluminum alloy by means of FLW method, indicates the possibility of reducing the UFG structure degradation in the obtained joint. A laboratory designed LFW machine has been used to weld the specimens with different contact pressure and oscillation frequency.

KW - Friction Stir Welding (FSW)

KW - Linear Friction Welding (LFW)

KW - Rotary Friction Welding (RFW)

KW - Severe Plastic Deformation (SPD)

KW - Ultrafine Grained (UFG)

UR - http://hdl.handle.net/10447/290226

UR - http://scitation.aip.org/content/aip/proceeding/aipcp

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EP - 500126

ER -