Transient Liquid Diffusion Bonding of AISI304 Stainless Steel with a Nickel Base Interlayer

2017 ◽  
Vol 380 ◽  
pp. 48-54 ◽  
Author(s):  
R. Jamshidi Lamjiri ◽  
A. Ekrami
Keyword(s):  
Stainless Steel ◽  
Shear Strength ◽  
Bonding Temperature ◽  
Alloying Elements ◽  
Joint Region ◽  
Joint Shear Strength ◽  
Homogenization Time ◽  
Parent Alloy ◽  
Electron Microscopes ◽  
Nickel Base

AISI304 stainless steel was bonded by a nickel base interlayer, using a TLP bonding method at 1150 °C with different holding times. The microstructure of the joint region was studied by optical and scanning electron microscopes. The results showed that 20 minutes holding time is sufficient for complete isothermal solidification. At the bonding times of 4, 10, 15 minutes, a eutectic structure was formed at the joint region. The distribution of alloying elements within the joint region and diffusion affected zone were detected using EDS. The results showed that the eutectic microstructure consists of Fe and Cr borides and the isothermal solidified zone consists of solid solution of Fe and Ni at the bonding temperature. Samples with complete isothermal solidified joint were homogenized at 950°C for different times from 30 to 360 minutes to study the distribution of alloying elements between joint region and parent alloy. The results showed more uniform distribution of alloying elements with increasing the homogenization time due to the diffusion of alloying elements between the joint region and the parent alloys. Microhardness and shear strength of joined samples were measured and compared to that of the parent alloy at the same heat treatment condition. The joint shear strength of TLP bonded samples was about 82% that of the parent alloy at the homogenization time of 180 minutes.

Mechanical and microstructure property evaluation of diffusion bonding of 5083, 6061 and 7075 aluminium to AZ31 magnesium using Cu interlayer

2021 ◽  
pp. 095440542110144
Author(s):  
Nader Nadermanesh ◽  
Abdolhamid Azizi ◽  
Sahebali Manafi
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Diffusion Bonding ◽  
Bonding Temperature ◽  
Effect Of Temperature ◽  
Process Conditions ◽  
Micro Hardness ◽  
Bonding Pressure ◽  
Electron Microscopes ◽  
Cu Interlayer

The diffusion bonding of 7075, 6061 and 5083 aluminium alloys to AZ31B magnesium was investigated using copper interlayer. An optical microscope along with scanning electron microscopes, equipped with an energy dispersive spectrometry/electron probe microanalysis, was utilized to characterize the microstructure of the joint. The mechanical properties of the joint were also assessed by micro-hardness and shear strength tests. The results indicate the high effect of temperature on the bonding results; so that, with a small change in temperature, severe changes were observed in the bonding results. A temperature range of 475°C–485°C and a minimum duration of 30 min with a low bonding pressure of 0.4 MPa were identified as advisable process conditions. The joint evaluation revealed the formation of CuAl2, Cu9Al4 and Al-Mg-Cu ternary phases on the aluminium-copper side, as well as Cu2Mg, CuMg2 and Al-Mg-Cu ternary phases on the magnesium-copper side in the reaction layer. When increasing the bonding temperature and duration, the amount of intermetallic compounds and, as a result, the mechanical properties of the joints changed. The highest shear strength and micro-hardness, related to the bonding performed at 480°C and holding time of 45 min, were 31.03 MPa and 167 HV, respectively.

Effect of Brazing Temperature and Clearance on Microstructure and Mechanical Properties of 316L Stainless Steel Brazed Joints

2011 ◽  
Vol 418-420 ◽  
pp. 1242-1245
Author(s):  
Zhuo Jun Chen ◽  
Chang Jin Yang ◽  
Xiao Long Gu ◽  
Cheng Dong Wu ◽  
Long Long Feng
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Shear Strength ◽  
Solid Solutions ◽  
316L Stainless Steel ◽  
Joint Shear Strength ◽  
Vacuum Brazing ◽  
Microstructure And Mechanical Properties ◽  
Brazed Joints ◽  
Joint Shear

Vacuum brazing of 316L stainless steel with BNi-2 brazing filler metal.The effects of brazing temperature and brazing clearance on microstructure and mechanical properties of vacuum brazed joints of 316L stainless steel were studied. The results show that: As brazing temperature being 1 070 °C, with the increasing of the brazing clearance, the joint shear strength value become lower and lower. Brazing clearance compounds mainly contain intermetallic and solid solutions.

scholarly journals Effect of Alloying Elements Gradient on Solid-State Diffusion Bonding between Aerospace Aluminum Alloys

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1446 ◽  
Author(s):  
Fan Wu ◽  
Wenlong Zhou ◽  
Yujie Han ◽  
Xuesong Fu ◽  
Yanjin Xu ◽  
...  
Keyword(s):  
Shear Strength ◽  
Diffusion Coefficient ◽  
Aluminum Alloys ◽  
Bond Strength ◽  
Bonding Temperature ◽  
Alloying Elements ◽  
Bond Quality ◽  
Shear Strength Test ◽  
State Diffusion ◽  
Different Temperatures

Three different bonding couples assembled by two commonly used aerospace aluminum alloys were bonded within the temperature range of 460–520 °C under 6 MPa for 60 min in vacuum atmosphere. The interface microstructure and alloying elements distribution of the bonded joints were determined by scanning electron microscope (SEM) and Energy Dispersive Spectroscope (EDS); the bond strength was evaluated by tensile-shear strength test. The results show the bond quality improved effectively as the bonding temperature increased. Compared with the 1420-1420 and 7B04-7B04 bonding couples, the 1420-7B04 couples obtained better interface integrity and higher bond strength, the highest shear strength for 1420-7B04 couple can be as high as 188 MPa when bonded at 520 °C. Special attention was focused on the 1420-7B04 couple, the diffusion coefficient of Mg at the original interface under different temperatures were investigated, the results show the diffusion coefficient increased obviously as the bonding temperature increased. A diffusion affected zone (DAZ) without continuous intermetallic phases formed due to the diffusion of alloying elements across the bonding interface. The combined action of temperature and alloying elements gradient resulted in the increase of alloying elements diffusion fluxes, which in turn promote the bonding quality through the accelerated shrinkage of interfacial voids.

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

scholarly journals Influence of Processing Parameters on Laser Direct Joining of CFRTP and Stainless Steel

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Liyuan Sheng ◽  
Junke Jiao ◽  
Beining Du ◽  
Feiya Wang ◽  
Qiang Wang
Keyword(s):  
Stainless Steel ◽  
Shear Strength ◽  
Laser Power ◽  
Scanning Speed ◽  
Processing Parameters ◽  
Joint Interface ◽  
Joint Shear Strength ◽  
Laser Joining ◽  
Joint Quality ◽  
Clamping Pressure

The CFRTP and the stainless steel were joined by the fiber laser, and the effect of processing parameters on the joint quality was investigated in detail. The heat-affected zone on the stainless steel and the microstructure of the joint interface were examined and analyzed. The results showed that the laser joining process refines the microstructure of the fusion and heat-affected zones in the stainless steel. And the tensile strength of the joint was affected greatly by the laser power and scanning speed but slightly by the clamping pressure. With the PPS additive, the joint shear strength could be improved, and the optimal PPS additive thickness is 300 μm. With the best parameters, joint with a shear strength of 15–17 MPa could be obtained as the laser power is 320–350 W, the scanning speed is 4-5 mm/s, the clamping pressure is about 0.5 Mpa, and the additive PPS thickness is about 300 μm.

WAUKESHA ALLOY 88

Alloy Digest ◽  
1993 ◽  
Vol 42 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
High Temperature ◽  
Physical Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Corrosion Resistant ◽  
Temperature Performance ◽  
Nickel Base

Abstract WAUKESHA METAL NO. 88 is a corrosion resistant nickel-base alloy compounded to run against stainless steel without galling or seizing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as casting, heat treating, machining, and joining. Filing Code: Ni-84. Producer or source: Waukesha Foundry Company. Originally published July 1963, revised February 1993.

CM-R 411

Alloy Digest ◽  
1967 ◽  
Vol 16 (9) ◽  
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Gas Turbine ◽  
Precipitation Hardening ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Jet Engine ◽  
Temperature Performance ◽  
Nickel Base

Abstract CM-R41 is a vacuum-melted, precipitation hardening nickel-base alloy possessing outstanding properties in the temperature range of 1200 F to 1800 F. It is recommended for jet engine and gas turbine components operating at high temperatures. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and shear strength as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ni-127. Producer or source: Cannon-Muskegon Corporation.

SANDVIK SANICRO 75X1

Alloy Digest ◽  
2005 ◽  
Vol 54 (10) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Steel Company ◽  
Spring Wire ◽  
Nickel Base

Abstract Sandvik Sanicro 75X1 is a nickel-base age-hardenable spring wire. This datasheet provides information on composition, physical properties, tensile properties, and shear strength. It also includes information on corrosion resistance as well as forming and heat treating. Filing Code: Ni-627. Producer or source: Sandvik Steel Company.

NIMONIC PK33

Alloy Digest ◽  
2005 ◽  
Vol 54 (7) ◽  
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Ultrahigh Strength ◽  
Temperature Performance ◽  
Nickel Base

Abstract Nimonic alloy PK33 is a nickel-base aerospace alloy developed to produce sheet with ultrahigh strength and good formability. This datasheet provides information on composition, physical properties, hardness, tensile properties, and shear strength as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ni-626. Producer or source: Special Metals Corporation.

ACI HW

Alloy Digest ◽  
1957 ◽  
Vol 6 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Base Alloy ◽  
Heat Treating ◽  
Cyclic Heating ◽  
Nickel Base Alloy ◽  
Type Alloy ◽  
Temperature Performance ◽  
Nickel Base

Abstract Type HW is a nickel-base alloy containing chromium and iron. It is austenitic, non-magnetic, and has exceptionally high resistance to corrosion, cyclic heating, and oxidation. It is of the 60 Ni-12Cr type alloy. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Ni-37. Producer or source: Stainless steel foundries. Revised as Alloy Digest Ni-449, April 1994.

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