Topic
Filler metal
About: Filler metal is a research topic. Over the lifetime, 11152 publications have been published within this topic receiving 86590 citations.
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17 Sep 2003
24 citations
Patent•
30 Jul 1990
TL;DR: In this article, an improved heat resisting structure for treating the exhaust gas of a gas engine is disclosed, which has a honeycomb-form structure formed of corrugated and flat sheets which are alternately overlapped, rolled up, and joined via a brazing filler metal to make a roll-formed structure.
Abstract: An improved heat resisting structure for treating the exhaust gas of a gas engine is disclosed. The heat resisting structure has a honeycomb-form structure formed of corrugated and flat sheets which are alternately overlapped, rolled up, and joined via a brazing filler metal to make a roll-form structure. The brazing filler metal is made of iron(Fe)-base brazing filler metal, and the stainless steel corrugated sheet and flat sheet constituting the base metal are similar in composition. Accordingly, almost no difference exists in the coefficient of thermal expansion between the brazing filler metal and the base metal. As a result, cracks caused by thermal stress between them due to a difference in coefficient of thermal expansion is avoided even when used repeatedly.
24 citations
25 Feb 2006-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the fracture location of joint is mainly at Al-Cu-Ti intermetallic compound layer, the fracture pattern of brazed joint deviate from transcrystalline crack at room temperature into intergranular crack.
Abstract: TiAl-based intermetallics joined by vacuum induction brazing using Ag–Cu35.2–Ti1.8 filler alloy at 850–970 °C for 1–10 min was investigated. The optimum brazing parameters are as follows: brazing temperature is 870–880 °C, brazing time is 4–6 min. The maximum tensile strength of the joint is 320 MPa for the specimen induction brazed at for 870 °C for 5 min, and at this time, the thickness of Al–Cu–Ti intermetallic compound layer is about one third of that of the whole interface. Interfacial microstructure of TiAl/Ag–Cu–Ti/35CrMo joint brazed at 870 °C for 5 min is instable at 400 °C. The instantaneous high temperature strength is 248 MPa at 400 °C, the fracture location of joint is mainly at Al–Cu–Ti intermetallic compound layer, the fracture pattern of brazed joint deviate from transcrystalline crack at room temperature into intergranular crack.
24 citations
TL;DR: In this article, a novel method is proposed to evaluate the welding quality during a three-dimensional extrusion process, which extends the application of the current welding criterion from a 2D extrusion to a 3D one.
24 citations
Patent•
13 Mar 2007
TL;DR: In this paper, a friction stir welding machine is used to perform solid phase welding on a welding portion of materials to be welded, by pressing a welding tool against the welding portion and forcing the tool to be advanced into a softened portion which is softened by a frictional heat while stirring the softened portion.
Abstract: The present invention is a friction stir welding machine adapted to perform solid phase welding on a welding portion of materials to be welded, by pressing a welding tool against the welding portion of the materials to be welded while rotating the welding tool, and forcing the welding tool to be advanced into a softened portion which is softened by a frictional heat while stirring the softened portion, wherein a coating made of aluminum nitride is formed on at least a region of the welding tool to be in contact with the materials to be welded.
24 citations