Revisiting fundamental welding concepts to improve additive manufacturing: From theory to practice

Joining of Inconel 718 and 316 Stainless Steel using electron beam melting additive manufacturing technology

Characterization of microstructures and mechanical properties of Inconel 617/310 stainless steel dissimilar welds

Characterization of microstructure, mechanical properties and corrosion resistance of dissimilar welded joint between 2205 duplex stainless steel and 16MnR

An assessment of microstructure, mechanical properties and corrosion resistance of dissimilar welds between Inconel 718 and 310S austenitic stainless steel

Dissimilar welding of AISI 310 austenitic stainless steel to nickel-based alloy Inconel 657

This investigation is carried out to characterize welding of AISI 310 austenitic stainless steel (SS) to INCONEL 657 nickel-chromium superalloy. The welds were produced using four types of filler materials: the nickel-based corresponding to INCONEL 82, INCONEL A, INCONEL 617, and 310 austenitic SS. This article describes the effects of aging treatment on the joints. A comparative evaluation based on microstructural features and estimation of mechanical properties was performed. INCONEL A and INCONEL 82 exhibited the highest thermal stability and mechanical properties, while INCONEL 617 and 310 SS filler materials showed weak mechanical properties and thermal stability. It is therefore concluded that for the joints between INCONEL 657 and 310 SS, INCONEL A and INCONEL 82 filler materials offer the best compromises.

Influence of Artificial Aging on Microstructure and Mechanical Properties of Dissimilar Welds between 310 Stainless Steel and INCONEL 657

This investigation has been performed to characterize dissimilar metal welds between type 310 austenitic stainless steel (SS) and Inconel 657 superalloy. The welds were produced using four types of filler materials: Inconel 82, Inconel A, Inconel 617, and type 310 SS. The weldments were characterized in detail using optical metallography and scanning electron microscopy. It can be concluded that Inconel A weld metal does not promote severe hot cracking. Continuous NbC precipitates in the Inconel 82 weld metal can sensitize the weld metal to solidification cracking. The presence of high amounts of Mo in Inconel 617 weld metal led to the formation of brittle phases. In addition, continuous precipitates were observed in the 310 SS weld metal, which can lead to poor resistance of the weld metal to hot cracking. In the aged condition, Inconel 82 and Inconel A exhibited good thermal stability, whereas Inconel 617 and type 310 SS exhibited poor thermal stability. Also, after subjecting the heat-affected zone and interface between Inconel weld metal and base metals to aging treatment, unmixed zone of Inconel 657 base metal side has disappeared. Elimination of this region can be attributed to high-temperature interdiffusion of alloying elements. Finally, it is found that Inconel A and Inconel 82 weld metals are the best choices for the dissimilar welds performed here, respectively.

Microstructural evolutions in dissimilar welds between AISI 310 austenitic stainless steel and Inconel 657

Microstructural evolution and solidification cracking susceptibility of dissimilar metal welds between Type 310 austenitic stainless steel and Inconel 657, a nickel-based alloy, were studied using a combination of electron microscopy analysis and Varestraint testing techniques. In addition, the effect of filler metal chemistry on the fusion zone composition, microstructure, and resultant weldability was investigated. The good cracking resistance of welds prepared with Inconel A was due to a small amount of secondary phase (NbC) and narrow solidification temperature range. The relatively poor cracking resistance of welds prepared with Inconel 82 and Type 310 stainless steel (310 SS) was a result of a wide solidification temperature range and an increase in the amount of secondary phases. Consequently, it is concluded that for the joint between Inconel 657 and 310 SS, filler material of Inconel A offers the best weldability.

Weldability in dissimilar welds between Type 310 austenitic stainless steel and Alloy 657

The aim of this paper is to characterize welding of AISI 310 austenitic stainless steel to Inconel 657 for use in oil-refining industries. The welds were produced using four types of filler materials; nickel-based alloys designated as Inconel 82, A, 617, and 310 SS. The interfaces and heat-affected zones were characterized by optical and scanning electron microscopy. Interfaces on the two sides of the joints showed unmixed and heat-affected zones, while a partially melted zone was observed in the interdendritic regions of the HAZ in Inconel 657. The microhardness profile from the base metal to the HAZ exhibited high hardness in the case of Inconel 657 as an indication of α-Cr precipitation in the HAZ of all the filler materials investigated and as the occurrence of precipitation hardening. It was concluded that undesirable regions such as UZ, HAZ, and PMZ have the least average size for Inconel 82 and 310 SS weldments among the weld metals studied.

http://journal.issiran.com/article_4834_5bd7c376ea8e9b96b487e60b00fffec2.pdf

H. Naffakh

Papers

Dissimilar welding of AISI 310 austenitic stainless steel to nickel-based alloy Inconel 657

Influence of Artificial Aging on Microstructure and Mechanical Properties of Dissimilar Welds between 310 Stainless Steel and INCONEL 657

Microstructural evolutions in dissimilar welds between AISI 310 austenitic stainless steel and Inconel 657

Weldability in dissimilar welds between Type 310 austenitic stainless steel and Alloy 657

Interface and Heat-affected Zone Features of Dissimilar Welds between AISI 310 Austenitic Stainless Steel and Inconel 657