Topic
Filler metal
About: Filler metal is a research topic. Over the lifetime, 11152 publications have been published within this topic receiving 86590 citations.
Papers published on a yearly basis
Papers
More filters
••
01 Feb 2012-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, an Al-Mg alloy was joined to 304 stainless steel using a Zn-15Al filler metal with a noncorrosive flux core, and the weld solidification microstructure was explained based on the Al-Zn−Mg phase diagram.
Abstract: Gas-tungsten arc welding (GTAW) with controlled heat input could avoid the formation of massive brittle Al–Fe intermetallics during solidification in dissimilar-metal joining of aluminum to steel. In the first part of the present study an Al–Mg alloy was joined to galvanized steel by GTAW with an Al–Si filler metal. The weld solidification microstructure was explained based on the Al–Mg–Si phase diagram. Ultrasonic vibration during GTAW increased the joint strength by 27%. Grain refinement, decreased Fe–Al intermetallics, and increased microhardness in both the heat-affected zone and the weld were observed, thus explaining the improved joint strength. In the second part, an Al–Mg alloy was joined to 304 stainless steel using a Zn-15Al filler metal with a noncorrosive flux core. The weld solidification microstructure was explained based on the Al–Zn–Mg phase diagram. Postweld heat treatment (PWHT) at 280 °C for 30 min doubled or even tripled the joint strength depending on the Al-sheet thickness. Dissolution of coarse Zn-rich particles at the weld/steel interface was observed after PWHT, thus eliminating these weak particles from the interface. The formation of Zn-rich particles near the interface and their dissolution by PWHT were explained based on the Al–Fe–Zn phase diagram.
100 citations
••
TL;DR: Friction stir welding was investigated as a viable process for joining thin aluminum sheets in order to manufacture tailored blanks in this paper, and three alloys were tested: 5182-O, 5754-O and 6022-T4.
Abstract: Friction stir welding was investigated as a viable process for joining thin aluminum sheets in order to manufacture tailored blanks. In the present study three alloys were tested: 5182-O, 5754-O, and 6022-T4. All three of these alloys are being used to fabricate stamped automotive parts. The gas tungsten arc welding process has been used to make aluminum-tailored welded blanks industrially, so results using this process were compared to FSW results. Blanks of the same gage of all three alloys were welded and then evaluated using tensile and formability testing. The 5xxx series alloys had similar tensile ductility and formability regardless of the welding process. However, the 6022-T4 sheets joined using friction stir welding had better formability than those joined using gas tungsten arc welding because friction stir welding caused less softening in the heat-affected zone.
100 citations
••
TL;DR: In this article, sound Al Zn-steel "sandwich" joints were achieved with the tool pin inserted into zinc foil, vast zinc was stirred into aluminum fabricating AlZn mixing layer structure in the upper part of aluminum side and no intermetallic compound interlayer was discovered at the interface.
100 citations
••
TL;DR: In this paper, the ultrasonic vibration was applied to molten super-austenitic stainless weld metal during the shielded metal arc-welding process, and it was observed that the unmixed zone in the weld metal was completely eliminated by high-intensity ultrasonic vibrations.
99 citations