Influence of Effective Physical Contact Area on Microstructure and Mechanical Properties of Diffusion-Bonded TC4/1060Al Joints

Guoqiang Luo; Jiayu He; Zhenfei Song; Jian Zhang; Mei Rao; Jianjun Mo; Yiyu Wang; Qiang Shen; Lianmeng Zhang

doi:10.1007/s11665-019-3856-6

Influence of Effective Physical Contact Area on Microstructure and Mechanical Properties of Diffusion-Bonded TC4/1060Al Joints

Guoqiang Luo, Jiayu He, Zhenfei Song, Jian Zhang, Mei Rao, Jianjun Mo, Yiyu Wang, Qiang Shen, Lianmeng Zhang

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

In the present study, dissimilar TC4 alloy and 1060Al alloy were successfully diffusion-bonded at a very low temperature about 410 °C by improving the effective physical contact area. A sound joint with a crack-free interface and a high shear strength (128 MPa) is obtained with a combination of TC4 surface roughness of 109.90 μm (S _a ) and 1060Al surface roughness of 101.43 μm (S _a ), and customized parallel surface scratches. Under this condition, the two parent metals share the largest contact area during the physical contact stage of diffusion bonding process, which is consistent with the theoretical calculation. The results show that no Ti-Al binary intermetallic compounds are observed at the interface of the joints. The maximum shear strength of the joint reaches 128 MPa with optimized bonding parameters (410 °C for 120 min with a pressure of 20 MPa), which is higher than the shear strength of 1060Al (80 MPa) base metal. The fractography analysis indicates the joints failed with a ductile fracture at the 1060Al side.

Original language	English
Pages (from-to)	1226-1234
Number of pages	9
Journal	Journal of Materials Engineering and Performance
Volume	28
Issue number	2
DOIs	https://doi.org/10.1007/s11665-019-3856-6
State	Published - Feb 15 2019
Externally published	Yes

Funding

The authors gratefully acknowledge the sponsorship from the National Natural Science Foundation of China (No. 51572208 and 51521001), 111 Project (B13035), Nature Science Foundation of Hubei Province (2016CFA006), and Joint Fund (No. 6141A02022209). The authors would also like to thank Tiffany Jain, M.S., from Liwen Bianji, Edanz Group China (www.liwenbia nji.cn/ac), for editing the english text of a draft of this manuscript.

Funders	Funder number
Joint Fund	6141A02022209
Nature Science Foundation of Hubei Province	2016CFA006
National Natural Science Foundation of China	51521001, 51572208
Higher Education Discipline Innovation Project	B13035

Keywords

1060Al alloy
TC4 alloy
diffusion bonding
microstructure
physical contact area
shear strength

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10.1007/s11665-019-3856-6

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title = "Influence of Effective Physical Contact Area on Microstructure and Mechanical Properties of Diffusion-Bonded TC4/1060Al Joints",

abstract = " In the present study, dissimilar TC4 alloy and 1060Al alloy were successfully diffusion-bonded at a very low temperature about 410 °C by improving the effective physical contact area. A sound joint with a crack-free interface and a high shear strength (128 MPa) is obtained with a combination of TC4 surface roughness of 109.90 μm (S a ) and 1060Al surface roughness of 101.43 μm (S a ), and customized parallel surface scratches. Under this condition, the two parent metals share the largest contact area during the physical contact stage of diffusion bonding process, which is consistent with the theoretical calculation. The results show that no Ti-Al binary intermetallic compounds are observed at the interface of the joints. The maximum shear strength of the joint reaches 128 MPa with optimized bonding parameters (410 °C for 120 min with a pressure of 20 MPa), which is higher than the shear strength of 1060Al (80 MPa) base metal. The fractography analysis indicates the joints failed with a ductile fracture at the 1060Al side.",

keywords = "1060Al alloy, TC4 alloy, diffusion bonding, microstructure, physical contact area, shear strength",

author = "Guoqiang Luo and Jiayu He and Zhenfei Song and Jian Zhang and Mei Rao and Jianjun Mo and Yiyu Wang and Qiang Shen and Lianmeng Zhang",

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T1 - Influence of Effective Physical Contact Area on Microstructure and Mechanical Properties of Diffusion-Bonded TC4/1060Al Joints

AU - Luo, Guoqiang

AU - He, Jiayu

AU - Song, Zhenfei

AU - Zhang, Jian

AU - Rao, Mei

AU - Mo, Jianjun

AU - Wang, Yiyu

AU - Shen, Qiang

AU - Zhang, Lianmeng

PY - 2019/2/15

Y1 - 2019/2/15

N2 - In the present study, dissimilar TC4 alloy and 1060Al alloy were successfully diffusion-bonded at a very low temperature about 410 °C by improving the effective physical contact area. A sound joint with a crack-free interface and a high shear strength (128 MPa) is obtained with a combination of TC4 surface roughness of 109.90 μm (S a ) and 1060Al surface roughness of 101.43 μm (S a ), and customized parallel surface scratches. Under this condition, the two parent metals share the largest contact area during the physical contact stage of diffusion bonding process, which is consistent with the theoretical calculation. The results show that no Ti-Al binary intermetallic compounds are observed at the interface of the joints. The maximum shear strength of the joint reaches 128 MPa with optimized bonding parameters (410 °C for 120 min with a pressure of 20 MPa), which is higher than the shear strength of 1060Al (80 MPa) base metal. The fractography analysis indicates the joints failed with a ductile fracture at the 1060Al side.

AB - In the present study, dissimilar TC4 alloy and 1060Al alloy were successfully diffusion-bonded at a very low temperature about 410 °C by improving the effective physical contact area. A sound joint with a crack-free interface and a high shear strength (128 MPa) is obtained with a combination of TC4 surface roughness of 109.90 μm (S a ) and 1060Al surface roughness of 101.43 μm (S a ), and customized parallel surface scratches. Under this condition, the two parent metals share the largest contact area during the physical contact stage of diffusion bonding process, which is consistent with the theoretical calculation. The results show that no Ti-Al binary intermetallic compounds are observed at the interface of the joints. The maximum shear strength of the joint reaches 128 MPa with optimized bonding parameters (410 °C for 120 min with a pressure of 20 MPa), which is higher than the shear strength of 1060Al (80 MPa) base metal. The fractography analysis indicates the joints failed with a ductile fracture at the 1060Al side.

KW - 1060Al alloy

KW - TC4 alloy

KW - diffusion bonding

KW - microstructure

KW - physical contact area

KW - shear strength

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Influence of Effective Physical Contact Area on Microstructure and Mechanical Properties of Diffusion-Bonded TC4/1060Al Joints

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