Effects of Aging Treatment on the Hydrotreating Performance of the Unsupported Catalyst

In the present work, the effects of artificial aging treatment on the transformation temperatures and hardness of Cu-Al-Mn shape memory alloy have been investigated. The aging processes have been performed on the one-time re-melted and 90% rolled samples. Differential scanning calorimetry reveals that reverse transformation is present for the re-melted sample which is aged at 400°C. However, in 90% rolled condition, this transformation takes place at 200°C and 300°C. Hardness examination shows that the aged specimens possess higher values in hardness in comparison to un-aged samples at all studied temperatures. Although, the peak-aged condition was demonstrated at 300°C for the re-melted sample, the rolled sample displayed increased hardness levels up to 500°C. Based on the DSC measurements and microstructural observations, it can be asserted that the thermo-mechanical processing including rolling plus aging at 300°C provides favorable transformation characteristics for shape memory behavior.

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Corrigendum to: ‘Effects of aging treatment on microstructure and mechanical properties of selective laser melted Al-Zn-Mg-Cu-Si-Zr alloys’[Journal of alloys and compounds 890 (2022) 161810]

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2021.162929 ◽

2021 ◽

pp. 162929

Author(s):

Lanbo Li ◽

Tiechui Yuan ◽

Cao Deng ◽

Dan Zheng

Keyword(s):

Mechanical Properties ◽

Aging Treatment ◽

Microstructure And Mechanical Properties ◽

Effects Of Aging ◽

Alloys And Compounds ◽

Zr Alloys

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Effects of aging treatment on microstructure and mechanical property of an AZ80N magnesium alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2010.03.015 ◽

2010 ◽

Vol 527 (16-17) ◽

pp. 4076-4081 ◽

Cited By ~ 12

Author(s):

P.C. Wang ◽

M.C. Lin ◽

H.C. Lin ◽

K.M. Lin ◽

M.T. Yeh ◽

...

Keyword(s):

Mechanical Property ◽

Magnesium Alloy ◽

Aging Treatment ◽

Effects Of Aging ◽

Microstructure And Mechanical Property

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Effects of Aging Treatment on Performance of Explosive Welded Beryllium-Bronze/Carbon-Steel Composite Plate

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.117-119.862 ◽

2011 ◽

Vol 117-119 ◽

pp. 862-865 ◽

Cited By ~ 1

Author(s):

Guo Shang Zhang ◽

Shu Zeng Hou ◽

Shi Zhong Wei ◽

Ji Wen Li ◽

Liu Jie Xu

Keyword(s):

Shear Strength ◽

Carbon Steel ◽

Bond Strength ◽

Composite Plate ◽

Treatment Process ◽

Aging Treatment ◽

Beryllium Bronze ◽

Cold Bending ◽

Steel Composite ◽

Effects Of Aging

This paper dealt with how the aging time and temperature affected the hardness of beryllium bronze layer in the explosive welded beryllium-bronze/carbon-steel composite plate. The properties of shearing, bonding, cold bending and microhardness were studied in term of the composite plate, including the aging and nonaging. The optimum aging treatment process of the composite plate is aging temperature at 320°C for 3 hours. And the results show that: aging treatment has no obvious effects on the shear strength but sharply decreases bond strength of the composite plate. And aging treatment to a certain extent reduce the cold bending prroperty. After aging treatment, the microhardness value and distribution of carbon steel was no obvious change, and the microhardness of beryllium bronze sharply raised and smoothly distributed.

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Effects of High Temperature Aging Treatment on the Microstructure and Impact Toughness of Z2CND18-12N Austenitic Stainless Steel

Metals ◽

10.3390/met10121691 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1691

Author(s):

Hui Zhang ◽

Yanfeng Liu ◽

Xian Zhai ◽

Wenkai Xiao

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Impact Toughness ◽

Charpy Impact ◽

Aging Treatment ◽

Fracture Morphology ◽

Charpy Impact Test ◽

Scattered Electron ◽

Σ Phase ◽

Effects Of Aging

During the casting cooling process or the forging process, austenitic stainless steel will remain at around 800 °C for some time. During this period, precipitate particle behaviors in austenitic stainless steel (containing ferrite) will cause a reduction in ductility, which can lead to material cracking. In this study, the effects of aging at 800 °C on the microstructure, impact toughness and microhardness of Z2CND18-12N austenitic stainless steel were systematically investigated. The precipitation processes of the χ and σ phases were characterized by color metallography and back scattered electron (BSE) signals. The toughness was investigated by the Charpy impact test. After the aging treatment, the χ and σ phases precipitated successively in the ferrite, and as the aging duration increased, the χ-phase dissolved and the σ-phase precipitated along the austenite grain boundaries. These all lead to a decrease in toughness and an increase in microhardness. Finally, the relationship between fracture morphology and aging time is discussed herein, and a crack mechanism is given.

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