Effect of Milling Time and Heat-Treatment Temperature for Phase of Fe-25mol%Al Powder

The influence of heat treatment on the physico-mechanical properties, water resistance, and creep behavior of moso bamboo (Phyllostachys pubescens) was determined in this study. The results revealed that the density, moisture content, and flexural properties showed negative relationships with the heat treatment temperature, while an improvement in the dimensional stability (anti-swelling efficiency and anti-water absorption efficiency) of heat-treated samples was observed during water absorption tests. Additionally, the creep master curves of the untreated and heat-treated samples were successfully constructed using the stepped isostress method (SSM) at a series of elevated stresses. Furthermore, the SSM-predicted creep compliance curves fit well with the 90-day full-scale experimental data. When the heat treatment temperature increased to 180 °C, the degradation ratio of the creep resistance (rd) significantly increased over all periods. However, the rd of the tested bamboo decreased as the heat treatment temperature increased up to 220 °C.

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Accelerating the formation of high-quality optical surface layer in ZnO thin films by the increase of heat-treatment temperature

Optik ◽

10.1016/j.ijleo.2021.166527 ◽

2021 ◽

Vol 232 ◽

pp. 166527

Author(s):

Haisu Qian ◽

Linhua Xu ◽

Fenglin Xian ◽

Jing Su ◽

Xiaoqiang Luo

Keyword(s):

Thin Films ◽

Heat Treatment ◽

Surface Layer ◽

Heat Treatment Temperature ◽

Treatment Temperature ◽

Zno Thin Films ◽

Optical Surface ◽

High Quality

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Pyrolyzed biomass from corn ethanol industry coproduct and their polypropylene-based composites: Effect of heat treatment temperature on performance of the biocomposites

Composites Part B Engineering ◽

10.1016/j.compositesb.2021.108714 ◽

2021 ◽

pp. 108714

Author(s):

Drupitha M. Paleri ◽

Arturo Rodriguez-Uribe ◽

Manjusri Misra ◽

Amar Kumar Mohanty

Keyword(s):

Heat Treatment ◽

Heat Treatment Temperature ◽

Treatment Temperature ◽

Corn Ethanol

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Effect of Heat Treatment on the Microstructure and Property of TiAl Alloys Prepared by Gas Atomization Powders

Materials Science Forum ◽

10.4028/www.scientific.net/msf.747-748.497 ◽

2013 ◽

Vol 747-748 ◽

pp. 497-501

Author(s):

Na Liu ◽

Zhou Li ◽

Guo Qing Zhang ◽

Hua Yuan ◽

Wen Yong Xu ◽

...

Keyword(s):

Heat Treatment ◽

Heat Treatment Temperature ◽

Tial Alloy ◽

Lamellar Microstructure ◽

Treatment Temperature ◽

Gas Atomization ◽

Thermally Induced ◽

Heat Treated ◽

Fine Duplex ◽

Step Heat Treatment

Powder metallurgical TiAl alloy was fabricated by gas atomization powders, and the effect of heat treatment temperature on the microstructure evolution and room tensile properties of PM TiAl alloy was investigated. The uniform fine duplex microstructure was formed in PM TiAl based alloy after being heat treated at 1250/2h followed by furnace cooling (FC)+ 900/6h (FC). When the first step heat treatment temperature was improved to 1360/1h, the near lamellar microstructure was achieved. The ductility of the alloy after heat treatment improved markedly to 1.2% and 0.6%, but the tensile strength decreased to 570MPa and 600MPa compared to 655MPa of as-HIP TiAl alloy. Post heat treatment at the higher temperature in the alpha plus gamma field would regenerate thermally induced porosity (TIP).

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Effect of Pre-Weld Heat Treatment Temperatures on TIG Welded Microstructures on Nickel Base Superalloy, GTD-111

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.658.14 ◽

2015 ◽

Vol 658 ◽

pp. 14-18

Author(s):

Tanaporn Rojhirunsakool ◽

Duangkwan Thongpian ◽

Nutthita Chuankrerkkul ◽

Panyawat Wangyao

Keyword(s):

Heat Treatment ◽

High Temperature ◽

Heat Treatment Temperature ◽

Treatment Temperature ◽

Tig Welding ◽

Nickel Base Superalloy ◽

Nickel Base ◽

Base Superalloy ◽

Weld Heat

Nickel-base superalloys have been used as high temperature materials in land-base gas turbine application. When subjected to long term, high temperature service, large crack propagation was observed. Typical refurbishment method of these turbines is carried out by using TIG welding followed by post-weld standard heat treatment. However, new crack initiation is found in the heat-affected zone after TIG welding. Pre-weld heat treatment has been discovered to improves final γ + γ’ microstructure. This study focuses on the effect of pre-weld heat treatment temperature on final γ + γ’ microstructure. Seven different conditions of pre-weld heat treatment temperature were investigated. Scanning electron microscopy studies were carried out after pre-weld and post-weld heat treatments to compare the γ + γ’ microstructure and capture microcracks. The best pre-weld heat treatment temperature produces uniform distribution of finely dispersed γ’ precipitates in the γ matrix without post-weld crack.

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