A comparison of outgassing rate of 304 stainless steel and A6063‐EX aluminum alloy vacuum chamber after filling with water

In recent years, advances in coating deposition technologies have led to the development of nano-structured coating materials with unique properties. Among the many systems, Cr-Al-Si-N coatings have a variety of interesting properties such as the superhardness (~40 GPa), thermal stability with high-temperature oxidation resistance. These coatings were characterized as nanocomposites consisting of nanocrystalline CrN or CrAlN embedded in amorphous Si3N4 matrix. Nevertheless extensive discussion has been focused on the mechanical and thermal properties of Cr-Al-Si-N coating, the corrosion resistance at higher temperature is not reported yet. Therefore, the main target of this study is to evaluate the corrosion resistance of the CrN/AlSiN multilayer coating which was synthesized by cathodic arc deposition with Cr and Al88Si12 dual cathodes. The as-deposited coating was following conducted with heat treatment in nitrogen atmosphere at the temperature of 400 oC, 600 oC and 800 oC for 1 hour, respectively. Microstructure of the heated films is analyzed by X-ray photoelectron spectroscope, X-ray diffractometer and scanning electron microscopy. The corrosion resistance of the heated CrN/AlSiN coatings was studied by dipping in the aluminum alloy melt for 3 hours. The results turned out that the better corrosion resistance of CrN/AlSiN multilayer coated stainless steel was obtained by post deposition annealing treatment in nitrogen at 400 oC and 600 oC if compared to that of the other samples.

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Wettability, microstructure and properties of 6061 aluminum alloy/304 stainless steel butt joint achieved by laser-metal inert-gas hybrid welding-brazing

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(18)64839-3 ◽

2018 ◽

Vol 28 (10) ◽

pp. 1938-1946 ◽

Cited By ~ 6

Author(s):

Jun-yu XUE ◽

Yuan-xing LI ◽

Hui CHEN ◽

Zong-tao ZHU

Keyword(s):

Stainless Steel ◽

Aluminum Alloy ◽

Butt Joint ◽

Inert Gas ◽

304 Stainless Steel ◽

Hybrid Welding ◽

6061 Aluminum Alloy ◽

Microstructure And Properties

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Aluminum Foam Sandwich with Different Face-Sheet Materials under Three-Point Bending

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.872.25 ◽

2017 ◽

Vol 872 ◽

pp. 25-29 ◽

Cited By ~ 1

Author(s):

Chang Yan ◽

Xu Ding Song ◽

Shuo Feng

Keyword(s):

Stainless Steel ◽

Aluminum Alloy ◽

Aluminum Foam ◽

Sheet Material ◽

Face Sheet ◽

304 Stainless Steel ◽

Foam Core ◽

6061 Aluminum Alloy ◽

Three Point Bending ◽

Sheet Materials

Aluminum foam sandwich structure is a new type of composite material with excellent mechanical and functional properties. As it is known that properties of aluminum foam sandwiches (AFS) vary if the foam core is sandwiched between different face sheets. To study the effects of face-sheet materials on the mechanical properties of AFS and enable a better understanding of the usage of such AFS structures under flexural load, AFS sandwiched by 6061-aluminum alloy face-sheets and 304 stainless steel face-sheets were fabricated and investigated under three-point bending by using WDW-T100 electronic universal tensile testing machine. Results showed that 6061-aluminum alloy reinforced AFS had the same peak load value with 304-stainless steel reinforced one almost so long as the thicknesses of the face-sheet material were the same and the foam core densities were the same too, but the energy absorption ability of 304-stainless steel reinforced AFS was much higher than that of 6061-aluminum alloy reinforced. However, the integrality of the 6061-sandwiched AFS was better than 304-sandwiched AFS. Deformation modes of the two types of AFS were also discussed in the present study.

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