Mechanical Properties of Aluminium-Alumina Welding by Friction Welding

2011 ◽  
Vol 418-420 ◽  
pp. 1279-1287
Author(s):  
Tummasook Mingmuang ◽  
Sukangkana Lee ◽  
Chawalit Thinvongpituk
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Feed Rate ◽  
Friction Welding ◽  
Deformation Rate ◽  
Alumina Ceramics ◽  
Thermal Strength ◽  
Welding Temperature ◽  
Welding Interface ◽  
Maximum Shear Strength

This experiment was aimed to investigate mechanical properties of aluminium-alumina welding by using friction welding. Effect of feed rate on hardness and shear strength of welding interface were determined. Cracking of alumina ceramics was also investigated. In addition, this research is to define and analyse temperature of an interface and deformation rate of aluminium during process. It was found that welding temperature increased with increasing feed rate. Increasing feed rate resulted in increasing of deformation rate and flow of aluminium lead to incresing of welded area. After welding, hardness of aluminium near interface was increased from 44-46 HV to 52.6-55.7 HV. Hardness of aluminium decreased with increasing distance from interface. The maximum shear strength was 29 MPa obtained from 0.3 mm/s feed rate. The minimum shear strength was 3.1 MPa obtained from 0.1 mm/s feed rate. Shear strength was deteriorated by both mechanical and thermal strength. It can be clearly seen that increasing feed rate increase welded area, resulted in higher interface strength.

scholarly journals Diffusion Bonding of Ti6Al4V at Low Temperature via SMAT

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 94
Author(s):  
Yuqing Chen ◽  
Guofeng Wang ◽  
Yongkang Liu ◽  
Liqiang Zhan ◽  
He Diao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Diffusion Bonding ◽  
Welded Joint ◽  
Surface Mechanical Attrition Treatment ◽  
Mechanical Attrition ◽  
Long Time ◽  
Tc4 Alloy ◽  
Heat Preservation ◽  
Maximum Shear Strength

Titanium alloys used to be welded to gain good joint strength at 920 °C through diffusion bonding. However, due to the heat preservation at high temperatures for a long time, we obtain joints with great bond strength while the mechanical properties of the sheet are lost. In this paper, taking Ti6Al4V alloy as an example, we studied the microstructure of the surface under the different times of surface mechanical attrition treatment (SMAT). In addition, the microstructure and mechanical properties after diffusion bonding at 800 °C-5 MPa-1 h were also conducted. The results show that the shear strength of TC4 alloy welded joint after SMAT treatment is improved, and the maximum shear strength can reach 797.7 MPa, up about 32.4%

Jointing of Zirconia Ceramic and Titanium Alloy

2015 ◽  
Vol 1094 ◽  
pp. 305-310
Author(s):  
Xiang Feng Hu
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Shear Strength ◽  
Amorphous Alloy ◽  
Cooling Rate ◽  
Rate Increase ◽  
Zirconia Ceramic ◽  
Heat Time ◽  
Technical Parameters ◽  
Maximum Shear Strength

Zirconia ceramic and titanium alloy were jointed by using an AgCuTi amorphous alloy as a solder. The microstructure and the properties of the joint are investigated. The results show that the microstructure and mechanical properties of the brazing seam are influenced by the brazing temperature, the heat time and the cooling rate. The shear strength of the joint decreases with increasing of the brazing temperature, the heat time and the cooling rate increase. The maximum shear strength of the joints reaches 178 Mpa. The optimal technical parameters are the brazing temperature of 1123 K, the heat time of 10 min and the cooling rate of 5 K/min.

scholarly journals Improvement for Interfacial Microstructure and Mechanical Properties of Ti3SiC2/Cu Joint Brazed by Ag-Cu-Ti Filler with Copper Mesh

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 401
Author(s):  
Haiyan Chen ◽  
Xin Nai ◽  
Shuai Zhao ◽  
Decai Lu ◽  
Zhikang Shen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Coefficient Of Thermal Expansion ◽  
Interfacial Microstructure ◽  
Holding Time ◽  
Interface Microstructure ◽  
Microstructure And Mechanical Properties ◽  
The Difference ◽  
Maximum Shear Strength ◽  
Copper Mesh

Ti3SiC2 ceramic and copper were successfully vacuum brazed using Ag-Cu-Ti filler and Ag-Cu-Ti filler with copper mesh, respectively. In this study, the effects of copper mesh and brazing parameters on the interface microstructure and mechanical properties of the joints were systematically studied. The results revealed that the typical interfacial microstructure of joint was Ti3SiC2 ceramic/Ti5Si3 + TiC + Ti2Cu + Ti3Cu/Ag (s, s) + Cu (s, s)/eutectic Ag-Cu + TiSiCu/Cu. A maximum shear strength of joint obtained at a brazing temperature of 870 °C and a holding time of 10 min can reached up to 66.3 ± 1.2 MPa, which was 34.7% higher than that without copper mesh. The improvement of mechanical property was attributed to the extraordinary plasticity of copper mesh, which reduced the residual stress caused by the difference in the coefficient of thermal expansion at the interface of joints. As the brazing temperature and holding time further increased, the shear strength of joints decreased due to the excessively thick reaction layer of intermetallic compounds.

scholarly journals Reactive Air Brazing of TiAl Alloy Using Ag-CuO: Microstructure and Joint Properties

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1496
Author(s):  
Haoran Yang ◽  
Xiaoqing Si ◽  
Chun Li ◽  
Jian Cao
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Tial Alloy ◽  
Oxide Layers ◽  
Wetting Behavior ◽  
Air Atmosphere ◽  
Microstructure And Mechanical Properties ◽  
Joint Properties ◽  
Brazed Joints ◽  
Maximum Shear Strength

TiAl alloy was successfully brazed with Ag-CuO filler in air atmosphere under simple technical conditions. The wettability of a series of Ag-CuO fillers on TiAl was analyzed. Ag-2mol%CuO filler possessed good wetting behavior on TiAl alloy. The microstructure and mechanical properties of the brazed joints were investigated. Oxide layers can be found on both sides, which can be divided into external TiO2-rich layer and internal Al2O3-rich layer. The maximum shear strength of the joint was obtained at 1020 °C holding for 20 min.

The Effect of Diameter of Stirrer on Microstructure and Mechanical Properties of Joint Braze by Stirring Brazing of Al/Mg Alloy

2013 ◽  
Vol 785-786 ◽  
pp. 1091-1094 ◽  
Author(s):  
Hui Bin Sun ◽  
Hui Bin Xu
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Mg Alloy ◽  
Al Alloy ◽  
Microstructure And Mechanical Properties ◽  
Maximum Shear Strength

2024 al alloy and Az31B Mg alloy joint by stirring brazing without flux in air. The microstructure and mechanical character of the interface were investigated. The results show that the maximum shear strength of the Al interface can up to 58.7Mpa and 37.5Mpa to Mg interface.

scholarly journals Microstructure and properties of ZrO2 ceramic and Ti-6A-4V alloy vacuum brazed by Ti-28Ni filler metal

2019 ◽  
Vol 91 (10) ◽  
pp. 35-41 ◽  
Author(s):  
Li Hong ◽  
Liu Xuan ◽  
Huang Haixin
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Filler Metal ◽  
Interfacial Microstructure ◽  
Holding Time ◽  
Metal Interface ◽  
Ceramic Filler ◽  
Rich Phase ◽  
Brazed Joints ◽  
Maximum Shear Strength

Reliable ceramics/metal joints have an extensive application in the aerospace and biomedical area. However, ZrO2ceramic has not been investigated systematically compared to the Si3N4and Al2O3ceramic. Therefore, successful brazing of ZrO2ceramic and Ti-6A-4V alloy was achieved by using a binary active Ti-28Ni filler metal in this paper. The effect of holding time on the microstructure of ZrO2 ceramic/filler metal interface and mechanical properties of brazed joints was investigated. The results indicated that the representative interfacial microstructure was ZrO2ceramic/Ti2O/Ni2Ti4O/Ti-rich phase/Ti2Ni+α-Ti. With the increase of holding time, the thickness of Ti-rich layer in the interface of ZrO2/Ti-6Al-4Vjoint decreased obviously due to the diffusion of Ti atoms. Substantial brittle intermetallic compounds Ti2Ni and Ni2Ti4O were formed in the joint, which were detrimental to the mechanical properties of the brazed joints. The maximum shear strength of joint was 112.7 MPa when brazed at 1060 °C for 10 min.

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

2011 ◽  
Vol 418-420 ◽  
pp. 1494-1497 ◽  
Author(s):  
Xiao Long Gu ◽  
Chang Jin Yang ◽  
Zhuo Jun Chen ◽  
Cheng Dong Wu ◽  
Long Long Feng
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Shear Strength ◽  
316L Stainless Steel ◽  
P Element ◽  
Effect Of Temperature ◽  
Welding Temperature ◽  
Soldering Temperature ◽  
Microstructure And Mechanical Properties ◽  
Brazed Joints

The effects of brazing temperature on microstructure and mechanical properties of vacuum brazed joints of 316L stainless steel were studied. Choose three soldering temperature. After soldering, observed the microstructure, element distribution, microhardness and shear strength of welding clearance. The results show that the welding temperature for 940 °C, the brazing clearance organization mainly by Ni-Cr-P phase composition. Joint performance is poor, element can't get enough spread. P element does not spread easily, mainly in the brazing clearance; Cr element can spread along the grain boundary into mother material; the ability of spread of Ni elements is less than the Cr element. While welding temperature of 970 °C, the shear strength is the highest, and the comprehensive performance is the best.

scholarly journals PENGARUH PEMBERIAN JUMLAH DAN RASIO (L/d) SERAT BENDRAT TERHADAP SIFAT MEKANIK BETON

2015 ◽  
Vol 13 (1) ◽  
pp. 13
Author(s):  
Ahmad Hafiz S.G ◽  
Erwin Rommel ◽  
Lukito Prasetyo
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Shear Strength ◽  
Steel Fiber ◽  
Concrete Specimen ◽  
Research Results ◽  
Concrete Cylinder ◽  
Fiber Concrete ◽  
Fiber Consumption ◽  
Maximum Shear Strength

PENGARUH PEMBERIAN JUMLAH DAN RASIO (L/d) SERAT BENDRAT TERHADAP SIFAT MEKANIK BETONThe Influence of Steel Fiber Amount And L/D ratio to Mechanical Properties of ConcreteAhmad Hafiz S.G1, Erwin Rommel2, Lukito Prasetyo31 Staf Badan Perencana dan Pengembangan Kampus UMM2,3 Jurusan Teknik Sipil Universitas Muhammadiyah MalangAlamat korespondensi : email: [email protected], [email protected], [email protected] concrete is the concrete which is mixed with fiber. The fiber was mixed into the concrete with the addition of fiber percentage. In this research, the fiber used was bendrat fiber. It had a diameter 0.8 mm which was cut be 1 cm, 2 cm, and 3 cm. Thus, the ratio (l/d) of fiber bendrat got 12,5 ; 25; and 37,5. Moreover, the amount of additional fiber used was 1 %, 2 % and 3 % from the amount of each cement ratio.In this research made 60 test concrete cylinder (150x300) mm in each of the 30 cylinder for testing compressive and 30 cylinders for testing tensile of the concrete. As for testing shear strength made 30 concrete specimen the shaped doubel-L (200x300x75) mm.The research results obtained that the wearing of a fiber ratio L/d = 12.5 will be able to enhance the tensile strength and shear stregth of concrete where fiber consumption bendrat as much as 3% obtained the greatest tensile strength 2,41 MPa or increased twice from the concrete without fibres, while for maximum shear strength reach 4,94 MPa with an increase of 54% compared to concrete without fibresKeywords: fiber concrete, steel fiber, tensile strength, shear strengthAbstrakBeton serat adalah bahan beton yang dicampur dengan serat dengan persentase tertentu. Dalam penelitian ini,serat yang digunakan adalah serat bendrat. Serat bendrat berdiamtere 0,8 mm dipotong-potong dengan panjang 1 cm, 2 cm dan 3 cm sehingga menghasilkan rasio L/d masing-masing 12,5; 25; dan 37,5. Sedangkan banyaknya serat yang ditambahkan terhadap volume berat yang digunakan masing-masing ; 1%, 2% dan 3%. Dalam penelitian dibuat 60 silinder diameter 150 mm dengan tinggi 300 mm masing-masing 30 silinder untuk pengujian tekan dan 30 silinder untuk pengujian tarik belah beton. Sedangkan untuk pengujian geser beton dibuat 30 specimen beton berbentuk doubel-L berukuran (200x300x75) mm. Hasil penelitian diperoleh bahwa pemakaian serat dengan rasio L/d=12,5 akan dapat meningkatkan kuat tarik dan kuat geser beton dimana pemakaian serat bendrat sebanyak 3% diperoleh kuat tarik terbesar 2,41 MPa atau meningkat 2 kali dari beton tanpa serat, sedangkan untuk kuat geser maksimal mencapai 4,94 MPa dengan kenaikan 54% dibandingkan dengan beton tanpa serat.Kata kunci : beton serat, serat bendrat, kuat tarik, kuat geser.

scholarly journals Optimization of Process Parameters in Dissimilar Joining between SAPH 440 steel with 6061 aluminum alloy by MIG Brazing

2021 ◽  
Vol 2 (1) ◽  
Keyword(s):  
Shear Strength ◽  
Aluminum Alloy ◽  
Feed Rate ◽  
6061 Aluminum Alloy ◽  
Dissimilar Joining ◽  
Optimization Of Process Parameters ◽  
Strength Behavior ◽  
Torch Angle ◽  
Wire Feed ◽  
Maximum Shear Strength

The aim of this paper was to determine an optimal brazing condition for dissimilar joining between SAPH 440 steel with 6061 aluminum alloy. The brazing variables investigated in this study encompassed brazing speed, brazing current, wire feed rate, and torch distance and its angle. Taguchi technique was employed as the experimental strategy, and response optimizations on shear strength were performed using the S/N ratio. Results indicated that brazing variables have given a significant effect on the shear strength behavior. The optimal brazing condition was at 540mm/min of brazing speed, 25 A of brazing current, 8m/min of wire feed rate, 3mm of torch distance, and 80 degree of torch angle. Lastly, the maximum shear strength prediction of the optimal condition was 3810.50N. Confirmation tests on the optimal brazing condition were 3451.21N.

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