Diffusion Bonding of Duplex Stainless Steel and Ti Alloy with and without Interlayer

2014 ◽  
Vol 783-786 ◽  
pp. 9-14
Author(s):  
Subrata Chatterjee ◽  
S. Kundu ◽  
S. Sam ◽  
B. Mishra
Keyword(s):  
Stainless Steel ◽  
Titanium Alloy ◽  
Shear Strength ◽  
Duplex Stainless Steel ◽  
Nickel Alloy ◽  
Diffusion Bonding ◽  
Base Alloy ◽  
Intermetallic Layer ◽  
Bonding Temperature ◽  
Ti Alloy

In the present study, the microstructure and strength properties of diffusion bonded joints of duplex stainless steel (SS) to Ti alloy (TiA) with and without nickel alloy (NiA) as an intermediate material was investigated in the temperature range of 800-950°C for 60 mins in vacuum. In the case of directly bonded stainless steel and titanium alloy, the layer wise σ phase and λ+FeTi phase mixture were observed at the bond interface. However, when nickel alloy was used as an interlayer, the interfaces indicate that Ni3Ti, NiTi and NiTi2 are formed at the nickel alloy-titanium alloy interface and the stainless steel-nickel alloy interface is free from intermetallics up to 875°C and above this temperature, Fe-Ti and Fe-Cr-Ti base intermetallics were formed. The irregular shaped particles have been observed within the Ni3Ti intermetallic layer. The joint tensile and shear strength were measured; a maximum tensile strength of ~519.2MPa and shear strength of ~398.3MPa were obtained for direct bonded joint when processed at 875°C. However, when nickel base alloy was used as an interlayer in the same materials at the bonding temperature of 900°C the bond tensile and shear strength increases to ~596.5MPa and ~434.4MPa, respectively. Keywords: Diffusion bonding, intermetallic compounds, interlayer, SEM, XRD

Weldability and machinability of the dissimilar joints of Ti alloy and stainless steel – A review

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yan Zhang ◽  
YuanBo Bi ◽  
JianPing Zhou ◽  
DaQian Sun ◽  
HongMei Li
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Bonding Temperature ◽  
Fusion Welding ◽  
Research Progress ◽  
Diffusion Welding ◽  
Ti Alloy ◽  
Dissimilar Joints ◽  
Advantages And Disadvantages ◽  
Fe Intermetallics

Abstract As two important industrial manufacturing materials, titanium alloys and stainless steel have their own advantages and disadvantages in terms of physical, chemical, and mechanical properties. The field of materials manufacturing has witnessed efforts to develop technical processes that can properly combine these two alloy types, aiming to effectively use their respective advantages. The welding technology for Ti alloy and stainless steel, as a research topic with broad prospects, is comprehensively and deeply analyzed in this review. The current research progress in this field was analyzed from different process perspectives such as fusion welding, brazing, diffusion welding, friction welding, explosive welding and vacuum hot-rolling welding. The results of the review showed that the greatest challenges of fusion welding are low ductility of the material, high residual stress, high cooling rate, and the formation of numerous brittle Ti-Fe intermetallics. By using appropriate intermediate materials between these two materials, the residual stress and brittle intermetallics near the interface of the transition joint can be minimised by solving the thermal expansion mismatch, reducing the bonding temperature and pressure, and suppressing the diffusion of elements such as Ti and Fe.

scholarly journals A Review on Diffusion Bonding between Titanium Alloys and Stainless Steels

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
De-feng Mo ◽  
Ting-feng Song ◽  
Yong-jian Fang ◽  
Xiao-song Jiang ◽  
Charles Q. Luo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Titanium Alloy ◽  
Titanium Alloys ◽  
Stainless Steels ◽  
Diffusion Bonding ◽  
Low Cost ◽  
Phase Interface ◽  
Intermetallic Phases ◽  
Voids Growth

High-quality joints between titanium alloys and stainless steels have found applications for nuclear, petrochemical, cryogenic, and aerospace industries due to their relatively low cost, lightweight, high corrosion resistance, and appreciable mechanical properties. This article reviews diffusion bonding between titanium alloys and stainless steels with or without interlayers. For diffusion bonding of a titanium alloy and a stainless steel without an interlayer, the optimized temperature is in the range of 800–950°C for a period of 60–120 min. Sound joint can be obtained, but brittle FeTi and Fe-Cr-Ti phases are formed at the interface. The development process of a joint mainly includes three steps: matching surface closure, growth of brittle intermetallic compounds, and formation of the Kirkendall voids. Growth kinetics of interfacial phases needs further clarification in terms of growth velocity of the reacting layer, moving speed of the phase interface, and the order for a new phase appears. The influence of Cu, Ni (or nickel alloy), and Ag interlayers on the microstructures and mechanical properties of the joints is systematically summarized. The content of FeTi and Fe-Cr-Ti phases at the interface can be declined significantly by the addition of an interlayer. Application of multi-interlayer well prevents the formation of intermetallic phases by forming solid solution at the interface, and parameters can be predicted by using a parabolic diffusion law. The selection of multi-interlayer was done based on two principles: no formation of brittle intermetallic phases and transitional physical properties between titanium alloy and stainless steel.

Comparative Study of Ti Alloy and Stainless Steel 304L Friction Welded Joint with Different Interlayer Process Methods

2015 ◽  
Vol 766-767 ◽  
pp. 739-744 ◽  
Author(s):  
R. Kumar ◽  
M. Balasubramanian
Keyword(s):  
Stainless Steel ◽  
Titanium Alloy ◽  
Joint Strength ◽  
Welded Joint ◽  
Ti Alloy ◽  
Dissimilar Metal ◽  
Rotary Friction Welding ◽  
Metal Joint ◽  
Nuclear Environment ◽  
Solid State Joining

Rotary Friction welding is a process of solid state joining, broadly in shaft and pipe weld, in the field of automobile, defence, aeronautical, chemical and nuclear environment assembly pipe lines. Due to its some distinctive advantages similar to ease of fabricate, environmentally sociable, high fabrication value and appropriate for similar, dissimilar metal joint. Now a day’s Titanium alloy and stainless steel materials are very popular material in industrial application due to its high mechanical potency, and non-corrosive in nature. In this study an attempt was made to join commercial rod of Ti-6Al-4V and Stainless steel304L with some methods and evaluates the joint strength. Different intermediate metals are taking on in this process and the outcomes are witnesses. From that study the best method of in-between metal was analyzed by carry out mechanical and metallurgical test.

The effect of thermal cycling in superplastic diffusion bonding of heterogeneous duplex stainless steel

2016 ◽  
Vol 96 ◽  
pp. 499-505 ◽  
Author(s):  
Haitao Qu ◽  
Hongliang Hou ◽  
Pengfei Li ◽  
Shuxia Li ◽  
Xueping Ren
Keyword(s):  
Stainless Steel ◽  
Thermal Cycling ◽  
Duplex Stainless Steel ◽  
Diffusion Bonding
Sign in / Sign up

Export Citation Format

Share Document