Transient liquid phase diffusion bonding and associated recrystallization phenomenon when joining ODS ferritic superalloys

Khan, Tahir I.; Wallach, E. R.

doi:10.1007/bf00356005

Cited by 27 publications

(10 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The joint is held at the bonding temperature until the melting point depressants are lost from the liquid interlayer by diffusion and the liquid interlayer solidifies isothermally due to the change in composition of the bond. This technique has been previously used to join different alloy systems including duplex stainless steels [23][24][25][26][27][28][29]. Figure 1 is a schematic picture of the steel plates-metallic glass assembly used in this work.…”

Section: Microchannel Reactormentioning

confidence: 99%

Design and testing of a microchannel reactor for the PROX reaction

Cruz

Sánz

Poyato

et al. 2011

Chemical Engineering Journal

View full text Add to dashboard Cite

The different steps for manufacturing a microchannel reactor for the PROX reaction are discussed. Transient Liquid Phase bonding (TLP) using a Ni-B-Si amorphous melt spun is used for joining micromilled Al-alloyed ferritic stainless steel plates followed by recrystallization at 1200ºC for 5 hours. A CuO x -CeO 2 catalyst synthesized by the coprecipitation method was washcoated on the microchannel block resulting in a homogenous 20-30 µm thick layer. The catalytic activity for CO-PROX reaction is similar in both the powder catalyst and the microchannel coated reactor but the selectivity is higher in the microchannel reactor. Keywords

show abstract

Section: Microchannel Reactormentioning

confidence: 99%

Design and testing of a microchannel reactor for the PROX reaction

Cruz

Sánz

Poyato

et al. 2011

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

“…Subsequently, given a suitable homogenization treatment, the microstructure and mechanical properties of the joint can resemble those of the base metal. 4) Most of works on TLP bonding have been concentrated on Ni base superalloys. [5][6][7] But, very few research results have been reported on the TLP bonding of duplex stainless steels, although their applications have been increasing.…”

Section: Introductionmentioning

confidence: 99%

Transient Liquid Phase Bonding of Nitrogen Containing Duplex Stainless Steel UNS S31803 Using Ni-Cr-Fe-Si-B Insert Metal

2003

View full text Add to dashboard Cite

Microstructural evolution during transient liquid phase (TLP) bonding of nitrogen containing duplex stainless steel UNS S31803 has been investigated. In order to evaluate mechanical property of joint, tensile strength test was carried out at room temperature. TLP bonding was conducted at the temperature range 1283-1353 K for 0-1000 s under a vacuum of 6.7 mPa using Ni-7 mass%Cr-3 mass%Fe-4.5 mass%Si-3.2 mass%B amorphous insert metal. The results show that the volume fraction of austenite () decreased with increasing bonding temperature and holding time. Particularly, in the case of prolonged holding time, the depleted area of phase was observed in the base metal adjacent to joints. There were linear correlations between the width of the remaining liquid phase and square root of holding time at each bonding temperature. In this investigation, the secondary phases formed in the joint area were (Cr, Mo) borides dominantly. For the specimen bonded for longer time up to 1000 s, boron nitride formed at the center and interface of joint area, on the other hand, the amount of borides decreased compared with the case of shorter bonding time. Tensile strength increased with holding time, and the bonding efficiency was $94% for the specimen held for 1000 s at 1353 K. Tensile strength of joint depended on, for a short holding time, brittle eutectic and borides, and after completion of isothermal solidification, depended on the boron nitride formed at the joint interface.

show abstract

“…These ® ne precipitates were most probably borides and silicides of iron as identi® ed in earlier work. 2 Although the iron based foil contained signi® cantly larger amounts of melting point depressants (B and Si) when compared with the nickel based interlayer, compositional analysis plotted as a function of distance from the bond centre indicated a …”

Section: Bonds Made With the Iron Based Interlayermentioning

confidence: 99%

Transient liquid phase bonding of a microduplex stainless steel using amorphous interlayers

Khan¹,

Orhan²,

Eroğlu³

2002

Materials Science and Technology

Self Cite

View full text Add to dashboard Cite

Microduplex stainless steels are two phase alloys which show excellent corrosion resistance and toughness. In order to join these special steels, fusion welding processes are normally used and a second post-weld heat treatment is necessary to regain the original ferrite to austenite ratio. In this study, transient liquid phase diffusion bonding was used to join a 2205 duplex stainless steel with the aid of amorphous interlayers. The research compares a Ni ± B ± Si ternary system with that of an Fe ± B ± Si interlayer, and compositional, microstructural and mechanical assessment was used to determine the quality of the bonds produced. These preliminary results show that the nickel based interlayer stabilises the austenitic phase along the bond length, which hinders grain growth across the joint region. In contrast, the iron based interlayer produces diffusion bonds, which show microstructural and compositional homogeneity across the joint region. Furthermore, mechanical and pitting corrosion tests show that transient liquid phase diffusion bonds can achieve properties similar to those of the parent alloy.MST/4896

show abstract

Transient liquid phase diffusion bonding and associated recrystallization phenomenon when joining ODS ferritic superalloys

Cited by 27 publications

References 3 publications

Design and testing of a microchannel reactor for the PROX reaction

Design and testing of a microchannel reactor for the PROX reaction

Transient Liquid Phase Bonding of Nitrogen Containing Duplex Stainless Steel UNS S31803 Using Ni-Cr-Fe-Si-B Insert Metal

Transient liquid phase bonding of a microduplex stainless steel using amorphous interlayers

Contact Info

Product

Resources

About