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Reactive resistance welding of Ti6Al4V alloy with the use of Ni(V)/Al multilayers
Author(s) -
Maj Łukasz,
Mars Krzysztof,
Morgiel Jerzy,
Godlewska Elżbieta
Publication year - 2017
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201600405
Subject(s) - materials science , intermetallic , alloy , metallurgy , soldering , foil method , welding , titanium alloy , contact resistance , composite material , layer (electronics) , crystallite , joint (building) , architectural engineering , engineering
The freestanding Ni(V)/Al multilayer foil was applied as a filler material in order to join Ti6Al4V alloy with the use of reactive resistance welding (RRW) technique. Present investigations, performed with the use of transmission electron microscopy (TEM) method, allowed to show that an application of high current ( I = 400 A for 2 min in vacuum conditions ∼10 –1 mbar) transformed the Ni(V)/Al multilayers into fine grain (<300 nm) NiAl phase. It also showed that the RRW process led to the formation of firm connection with nanoporosity limited only to the original contact plane between base material and the foil. Simultaneously, the formation of a narrow strip of crystallites of Ti 3 Al intermetallic phase elongated along the joint line (average size of ∼200 nm) was observed. The base material was separated from the joint area by a layer of up to ∼2 μm thickness of nearly defect free α‐Ti and β‐Ti grains from a heat affected zone (HAZ). The performed experiment proved that Ni(V)/Al multilayer could serve as a filler material for joining of Ti6Al4V alloys even without additional solder layer. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)