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Investigation of the influence of copper welding electrodes on Ti-8Al-1Mo-1V and Ti-6Al-2Sn-4Zr-2Mo with respect to solid metal induced embrittlement
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0001-5921-1935
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0002-7675-7152
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0003-3661-9262
2012 (Engelska)Ingår i: 6th EEIGM International Conference Advanced Materials Research: 7th and 8th November, 2011 EEIGM, Nancy, France, Bristol: IOP Publishing Ltd , 2012Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Solid Metal Induced Embrittlement (SMIE) is caused by a specific combination of two solid metals in intimate contact. Cadmium, gold, silver and copper are known to cause SMIE in certain titanium alloys. Solid copper is used in welding electrodes and fixtures in various manufacturing processes for titanium parts within the aerospace industry. In the case of resistance welding, titanium alloys are in intimate contact with solid copper, since the electrodes resistively heat the titanium part under pressure during the welding process. No previous published work that investigates the risk of using copper electrodes for welding of titanium alloys is available in the literature, but an initial study using U-bend testing indicates that solid copper in contact with Ti-8Al-1V-1Mo and Ti-6Al-2Sn-4Zr-2Mo could lead to SMIE. Therefore, in the present study, resistance welded Ti-8Al-1V-1Mo and Ti-6Al-2Sn-4Zr-2Mo have been evaluated to investigate the influence of copper electrodes on these alloys. Furthermore, resistance welded specimens sputtered with copper and gold to promote SMIE have also been evaluated. No SMIE was found in the resistance welded specimens, which may be explained by the short interaction time that the copper electrodes are in intimate contact with the titanium alloy, and/or the magnitude of residual stresses after welding, which may be too low to initiate SMIE.

Ort, förlag, år, upplaga, sidor
Bristol: IOP Publishing Ltd , 2012.
Serie
I O P Conference Series: Materials Science and Engineering, ISSN 1757-8981 ; 31
Nationell ämneskategori
Annan materialteknik
Forskningsämne
Materialteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-28415DOI: 10.1088/1757-899X/31/1/012014ISI: 000306212500014Scopus ID: 2-s2.0-84859866712Lokalt ID: 23388511-6a32-400d-9899-507d249192ccOAI: oai:DiVA.org:ltu-28415DiVA, id: diva2:1001612
Konferens
EEIGM International Conference on Advanced Materials Research : 11/06/2015 - 12/06/2015
Anmärkning
Validerad; 2012; Bibliografisk uppgift: Article number 012014 ; 20111206 (ysko)Tillgänglig från: 2016-09-30 Skapad: 2016-09-30 Senast uppdaterad: 2018-07-10Bibliografiskt granskad

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Åkerfeldt, PiaPederson, RobertAntti, Marta-Lena

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