Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
A study of weld formation in friction stir welding of electrogalvanised steel to aluminium alloy in lap joint configuration
KTH, Skolan för industriell teknik och management (ITM), Industriell produktion, Svetsteknologi.
(engelsk)Inngår i: Journal of Materials Processing Technology, ISSN 0924-0136, E-ISSN 1873-4774Artikkel i tidsskrift (Fagfellevurdert) Submitted
sted, utgiver, år, opplag, sider
Elsevier.
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-207187OAI: oai:DiVA.org:kth-207187DiVA, id: diva2:1096720
Merknad

QC 20170602

Tilgjengelig fra: 2017-05-18 Laget: 2017-05-18 Sist oppdatert: 2017-06-02bibliografisk kontrollert
Inngår i avhandling
1. Dissimilar joining of aluminium to ultra-high strength steels by friction stir welding
Åpne denne publikasjonen i ny fane eller vindu >>Dissimilar joining of aluminium to ultra-high strength steels by friction stir welding
2017 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Multi-material structures are increasingly used in vehicle bodies to reduce weight of cars. The use of these lightweight structures is driven by requirements to improve fuel economy and reduce CO2 emissions. The automotive industry has replaced conventional steel components by lighter metals such as aluminium alloy. This is done together with cutting weight of structures using more advanced strength steels. However, sound joining is still difficult to achieve due to differences in chemical and thermal properties.

 

This research aims to develop a new innovative welding technique for joining aluminium alloy to ultra-high strength steels. The technique is based on friction stir welding process while the non-consumable tool is made of an ordinary tool steel. Welding was done by penetrating the rotating tool from the aluminium side without penetrating into the steel surface. One grade of Al-Mg aluminium alloy was welded to ultra-high strength steels under lap joint configuration. Different types of steel surface coatings including uncoated, hot-dipped galvanised and electrogalvanised coating have been studied in order to investigate the influence of zinc on the joint properties. The correlation among welding parameters, microstructures, intermetallic formation and mechanical properties are demonstrated in this thesis.  Results have shown that friction stir welding can deliver fully strong joints between aluminium alloy and ultra-high strength steels. Two intermetallic phases, Al5Fe2 and Al13Fe4, were formed at the interface of Al to Fe regardless of surface coating conditions. The presence of zinc can improve joint strength especially at low heat input welding due to an increased atomic bonding at Al-Fe interface. The formation of intermetallic phases as well as their characteristics has been demonstrated in this thesis. The proposed welding mechanisms are given based on metallography investigations and related literature.

sted, utgiver, år, opplag, sider
KTH Royal Institute of Technology, 2017. s. 39
Serie
TRITA-IIP, ISSN 1650-1888
Emneord
Aluminium alloy, high strength steel, intermetallic, friction stir welding, dissimilar joining
HSV kategori
Forskningsprogram
SRA - Produktion
Identifikatorer
urn:nbn:se:kth:diva-207356 (URN)978-91-7729-390-3 (ISBN)
Disputas
2017-06-09, M311, Brinellvägen 68, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Forskningsfinansiär
XPRES - Initiative for excellence in production research
Merknad

QC 20170519

Tilgjengelig fra: 2017-05-19 Laget: 2017-05-19 Sist oppdatert: 2017-05-19bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Søk i DiVA

Av forfatter/redaktør
Ratanathavorn, Wallop
Av organisasjonen
I samme tidsskrift
Journal of Materials Processing Technology

Søk utenfor DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric

urn-nbn
Totalt: 336 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf