scholarly journals Experimental and Numerical Study of Transient Liquid Phase Diffusion Bonded DZ40M Superalloys

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 479
Author(s):  
Zhan Sun ◽  
Xi Chen ◽  
Lixia Zhang ◽  
Saisai Zhang ◽  
Jicai Feng
Keyword(s):  
Tensile Strength ◽  
Liquid Phase ◽  
Microstructural Evolution ◽  
Diffusion Bonding ◽  
Numerical Study ◽  
Transient Liquid Phase ◽  
Isothermal Solidification ◽  
Maximum Value ◽  
Brazed Joints ◽  
Eutectic Zone

Transient liquid phase (TLP) diffusion bonding of DZ40M cobalt-based superalloy was carried out using a self-made NiCrCoWB intermediate layer. The typical microstructure of the joint was investigated. The effect of holding time on the microstructural evolution and the tensile strength of the brazed joints was studied. The tensile strength of the joints TLP bonded at 1160 °C for 60 min reached the maximum value of 487 MPa, which was 88.6% of the base metal strength. The diffusion of boron and the evolution of the eutectic zone were numerically studied. The time needed for isothermal solidification completion was calculated and predicted, which was well in accordance with the experimental results.

Microstructural Evolution of TLP Bonded Ti3Al-Nb Alloy Joints

2014 ◽  
Vol 33 (6) ◽  
pp. 525-529 ◽  
Author(s):  
X.Y. Gu ◽  
Z.Z. Duan ◽  
X.P. Gu ◽  
D.Q. Sun
Keyword(s):  
Solid Solution ◽  
Liquid Phase ◽  
Microstructural Evolution ◽  
Bonding Temperature ◽  
Pure Copper ◽  
Transient Liquid Phase ◽  
Base Material ◽  
Isothermal Solidification ◽  
Bonding Time ◽  
Solid Solution Phase

AbstractIn the present study microstructural evolution in transient liquid phase (TLP) bonded Ti3Al-Nb alloy joints using a pure copper as interlayer was investigated. TLP bonded Ti3Al-Nb alloy joints composed of intermetallic compound layers were produced. Microstructural evolution of joints depended on both bonding time and bonding temperature. With increasing bonding time and bonding temperature, the joint width increased and amount of compounds in the joint decreased. The joint microstructure at 1173 K × 1 min mainly consisted of Ti (solid solution) + Ti2Cu + TiCu + Ti3Cu4 + Ti2Cu3 + TiCu4 + Cu (solid solution) phase and it changed to Ti (solid solution) + Ti2Cu + TiCu at 1223 K × 60 min. Compounds formed on cooling from the bonding temperature by liquid phase were eliminated from the joint at 1223 K × 60 min due to isothermal solidification of liquid phase. The increase of the width of joint is attributed to the composition difference between the isothermal solidification production and its adjacent base material.

Effect of Heating Rate on Transient Liquid Phase Diffusion Bonding of Ni-Based Superalloy GTD-111

2004 ◽  
Vol 449-452 ◽  
pp. 133-136 ◽  
Author(s):  
Woo Hyuk Choi ◽  
Sung Wook Kim ◽  
Chang Hee Lee ◽  
Jung Cheol Jang
Keyword(s):  
Liquid Phase ◽  
Heating Rate ◽  
Diffusion Bonding ◽  
Completion Time ◽  
Bonding Temperature ◽  
Transient Liquid Phase ◽  
Isothermal Solidification ◽  
Solidification Behavior ◽  
Phase Diffusion ◽  
Time Required

This study was carried out to investigate the effect of heating rate on dissolution and solidification behavior during transient liquid phase diffusion bonding of Ni-based superalloy GTD-111. The heating rate was varied by 0.1K/sec, 1K/sec, 10K/sec to the bonding temperatures 1373K and 1423K in vacuum. When the heating rate was slower and the bonding temperature was higher, the completion time of dissolution after reaching bonding temperature decreased. When the heating rate was very slow, the solidification proceeded before reaching bonding temperature and the time required for the completion of isothermal solidification was shorter. However, when the total time required for completion of solidification from the beginning of heating was considered, heating at 0.1K/sec was nearly the same as heating at 10K/sec.

Elements Diffusion Asymmetry in Transient Liquid Phase Diffusion Bonding of Dissimilar Metals

2011 ◽  
Vol 704-705 ◽  
pp. 823-827
Author(s):  
Zeng Gao ◽  
Si Jie Chen ◽  
Qin Xu
Keyword(s):  
Liquid Phase ◽  
Diffusion Bonding ◽  
Solidification Rate ◽  
Transient Liquid Phase ◽  
Isothermal Solidification ◽  
Argon Atmosphere ◽  
Bonding Process ◽  
Steel Pipe ◽  
Phase Diffusion ◽  
The Difference

12Cr2MoV steel pipe and T91 steel pipe were joined by transient liquid phase diffusion bonding process (TLP) in argon atmosphere using FeNiCrSiB amorphous filler. TP304H steel pipe and 12Cr2MoV steel pipe were joined by the same method using Fe78Si9B13 and BNi2 amorphous filler. The qualified welding joint can be achieved by suitable adjustment of process parameters. The diffusion asymmetry in TLP of different metals has been analyzed. The research shows that there exists a diffusion asymmetry in TLP of different metals. The main reason is the difference of isothermal solidification rate in different materials, which results in a deviation of the bonding interface from the original centerline to T91 and TP304H side.

Nanostructured Ni/Al2O3 Interlayer: Transient Liquid Phase Diffusion Bonding of Al6061-MMC

2019 ◽  
Author(s):  
Kavian Cooke ◽  
Tahir Khan
Keyword(s):  
Liquid Phase ◽  
Diffusion Bonding ◽  
Joint Strength ◽  
Transient Liquid Phase ◽  
Weight Ratio ◽  
Bonding Time ◽  
Joint Interface ◽  
Full Potential ◽  
Phase Diffusion ◽  
Alumina Particles

Aluminum metal matrix composites are materials frequently used in the automotive and aerospace industries due to their high strength-to-weight ratio, formability, corrosion resistance, and long-term durability. However, despite the unique properties of these materials, the lack of a reliable joining method has restricted their full potential in engineering applications. This article explores the effect of bonding time on transient liquid phase diffusion bonding of Al6061 containing 15 vol.% alumina particles using a 5 μm electrodeposited Ni-coating containing nano-sized alumina particles as the interlayer. Joint formation was attributed to the solid-state diffusion of Ni into the Al6061 alloy followed by eutectic formation and isothermal solidification at the joint interface. Examination of the joint region using scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction showed the formation of eutectic phases such as Al3Ni, Al9FeNi, and Ni3Si within the joint zone. The results indicate that the addition of nano-size reinforcements into the interlayer can be used to improve joint strength. The joint strength recorded was 136 MPa at a bonding time of 10 min with a marginal increase in the shear strength when the bonding time is increased to 30 min.

Transient liquid phase diffusion bonding Al-6061 using nano-dispersed Ni coatings

2012 ◽  
Vol 33 ◽  
pp. 469-475 ◽  
Author(s):  
Kavian O. Cooke ◽  
Tahir I. Khan ◽  
Gossett D. Oliver
Keyword(s):  
Liquid Phase ◽  
Diffusion Bonding ◽  
Transient Liquid Phase ◽  
Phase Diffusion ◽  
Al 6061
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