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%

Comparison of Surface Nanostructured Electrodeposited Cu Produced from Different Power Types: Microstructure and Tensile Properties

2009 ◽  
Vol 614 ◽  
pp. 189-196
Author(s):  
H.L. Chan ◽  
Jian Lu
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Direct Current ◽  
Pulse Power ◽  
Double Pulse ◽  
Surface Mechanical Attrition Treatment ◽  
Electrodeposition Process ◽  
Mechanical Attrition ◽  
Off Time

Different Power types and parameters in the electrodeposition process result in different microstructures and hence mechanical properties. In this paper, direct current and double pulse power with different combinations of on and off time have been used for electrodeposition. The tensile properties of the electrodeposited (Ed) Cu with different parameters in process have been studied and also the microstructures of the Cu obtained have been examined by SEM. This paper aims at explaining the effects of one of the important parameters in electrodeposition: different power types on the tensile properties. The tensile properties of Ed Cu after Surface Mechanical Attrition Treatment (SMAT) are also shown in this paper.

Improving mechanical properties for pure irons by local surface mechanical attrition treatment

2019 ◽  
Vol 35 (10) ◽  
pp. 1257-1264 ◽  
Author(s):  
Yinghui Wei ◽  
Huiqi Cui ◽  
Huan Wei ◽  
Baosheng Liu ◽  
Huayun Du ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Mechanical Attrition Treatment ◽  
Local Surface ◽  
Mechanical Attrition

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.

Effect of Al Thin Film on Microstructure and Mechanical Properties of Diffusion-Bonded LY12/TC4 Joints

2014 ◽  
Vol 616 ◽  
pp. 275-279
Author(s):  
Qiang Guo Luo ◽  
Xue Shu Hu ◽  
Qiang Shen ◽  
Lian Meng Zhang
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Shear Strength ◽  
Shear Fracture ◽  
Interfacial Microstructure ◽  
Microstructure And Mechanical Properties ◽  
Average Shear Strength ◽  
Tc4 Alloy ◽  
Thin Interlayer ◽  
Al Thin Film

LY12/TC4 joints have wide applications in many industrial areas such as aerospace, nuclear and chemical industries. In the present study, TC4 alloy and LY12 alloy with and without aluminum thin film was produced under low temperature of 380 oC. The microstructure and mechanical properties of the joints were investigated. The addition of the Al thin interlayer had largely improved the interfacial microstructure and shear strength of the joints. The average shear strength of LY12/Al/TC4 joints was 64.3 MPa which was 2.5 times larger than the LY12/TC4 joints’ strength. The shear fracture mainly occurred on the interface of LY12 and TC4 from the XRD result of fracture surfaces.

The Influence of Ti-6-4 Alloy Interlayer on Ti3Al Alloy DB Quality and Interface Mechanical Properties

2016 ◽  
Vol 838-839 ◽  
pp. 586-591
Author(s):  
Hui Yuan Xu ◽  
Ming Jie Fu ◽  
Xiu Quan Han ◽  
Jie Shao ◽  
Zhi Qiang Li
Keyword(s):  
Shear Strength ◽  
Ductile Fracture ◽  
Diffusion Bonding ◽  
Al Alloy ◽  
Resistant Material ◽  
Bonding Quality ◽  
Optical Micrograph ◽  
Defect Rate ◽  
Maximum Shear Strength ◽  
Ti3al Alloy

Ti3Al intermetallic alloy is a light and high-temperature resistant material which substitutes for superalloy. It is promising for wide use in aerospace yield. In this paper, the Ti3Al alloy was joined by diffusion bonding with and without Ti-6-4 alloy interlayer respectively. Diffusion bonding quality and shear strength of the joints were measured and compared. The results show that there was almost no defect found in joints with interlayer and maximum shear strength is 523 MPa in conditions of 940°C and 2.5 MPa pressure for 1.5h. In contrast, defect rate (percentages of sum of defects length in optical micrograph) of joints without interlayer exceeds 80% and maximum shear strength is only 150 MPa in same conditions. According to fracture analysis, the ductile fracture occurred at Ti-6-4 interlayer of joint with interlayer. Fracture of joint without interlayer belongs to mixed type of ductile fracture and brittle fracture.

Laser Remelting Effect on the Joint Property of Diffusion Bonding of TiAl Intermetallics and TC4 Alloy

2013 ◽  
Vol 747-748 ◽  
pp. 77-84
Author(s):  
Zi Gong Xue ◽  
Yuan Xun Huang ◽  
Yong Tian Wang ◽  
Xiao Jing Hai
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Mechanical Property ◽  
Diffusion Bonding ◽  
Fracture Behavior ◽  
Laser Remelting ◽  
Tial Intermetallics ◽  
Tc4 Alloy ◽  
Joint Property

The influence of laser remelting on the mechanical property and fracture behavior of the superplastic diffusion bonding between TiAl intermetallics and TC4 alloy was investigated. The joint bonded by the pre-remelted samples displayed well diffusion, but the mechanical properties of the joint should be further enhanced. The mechanical properties of the joint pre-remelted under the diffusion bonding conditions of 915/80MPa/1h are lower than that of the joint without remelting. After the heat treatment on pre-remelted joint sample at 860, the mechanical properties have been enhanced greatly.

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