Microstructural evolution and mechanical properties of Ti–5Al–5Mo–5V–3Cr alloy by heat treatment with continuous temperature gradient

2018 ◽  
Vol 28 (2) ◽  
pp. 273-281 ◽  
Author(s):  
Sheng-hang XU ◽  
Yong LIU ◽  
Bin LIU ◽  
Xin WANG ◽  
Zhi-xing CHEN
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Temperature Gradient ◽  
Microstructural Evolution ◽  
Continuous Temperature

Uphill Quenching of Aluminum Alloys

2019 ◽  
Author(s):  
Wellington da Silva Mattos ◽  
George Edward Totten ◽  
Lauralice de Campos Franceschini Canale
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Residual Stress ◽  
Aluminum Alloys ◽  
Temperature Gradient ◽  
Dimensional Stability ◽  
Steam Chamber ◽  
Conventional Heat Treatment ◽  
Quenching Process ◽  
Uphill Quenching

This article describes the concept of uphill quenching process applied in the heat treatment of aluminum alloys. Uphill quenching is interesting since residual stress reductions of up to 80% has been reported. In addition, substantial improvements in dimensional stability have been achieved for several types of aluminum parts. Often, uphill quenching is applied after quenching and before aging during the heat treatment of aluminum alloys. The uphill quenching process consists of the immersion of the part in a cryogenic environment, and after homogenization of the temperature, the part is transferred to the hot steam chamber to obtain a temperature gradient that will maintain the mechanical properties gained with this process. The results obtained are lower residual stress and better dimensional stability. The aim of this article is to provide a review of this process and to compare it with conventional heat treatment.

Microstructural evolution and mechanical properties of cast Al-2Li-2Cu-0.5Mg-0.2Zr alloy during heat treatment

2017 ◽  
Vol 132 ◽  
pp. 312-319 ◽  
Author(s):  
Xiaolong Zhang ◽  
Liang Zhang ◽  
Guohua Wu ◽  
Wencai Liu ◽  
Chunchang Shi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Microstructural Evolution

Prediction of Mechanical Properties and Microstructure Distribution of Normalized Large Marine Crankthrow

2007 ◽  
Vol 26-28 ◽  
pp. 1037-1040 ◽  
Author(s):  
Ming Yue Sun ◽  
Shan Ping Lu ◽  
Shi Jian Li ◽  
Dian Zhong Li ◽  
Yi Yi Li
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Computer Simulation ◽  
Microstructural Evolution ◽  
Temperature Evolution ◽  
Phase Volume ◽  
Cooling Process ◽  
Controlled Cooling ◽  
Prediction Of Mechanical Properties

Based on the measured CCT diagram of steel S34MnV, the parameters for the heat treatment of large marine crankthrow were designed, and the models for predicting microstructural evolution and mechanical properties were developed. By computer simulation, the temperature and phase volume evolutions in the controlled cooling process were predicted together with the final mechanical properties. Finally, the manufactural trial was carried out in heavy plant, the temperature evolution and final mechanical properties on the blank were obtained. The manufactural data agree well with the predicted results.

Microstructural Evolution and Mechanical Properties of Modified 9%Cr-1%Mo Steel upon Isothermal Heat-Treatment

2005 ◽  
Vol 475-479 ◽  
pp. 81-84
Author(s):  
Sung Kang Hur ◽  
Kee Sam Shin ◽  
Jung Hoon Yoo ◽  
Ja Min Koo ◽  
Soo Lee ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Mechanical Property ◽  
Microstructural Evolution ◽  
Heat Treating ◽  
Air Cooling ◽  
Isothermal Heat Treatment ◽  
Martensitic Structure ◽  
Heat Treated ◽  
Evolution Of Microstructure

The evolution of microstructure and its effects on the mechanical properties of modified 9%Cr-1%Mo steel during heat-treating at 1050°C for 15 min and then isothermal heat treatment at 380~760°C with subsequent air-cooling have been investigated. For the microstructural and mechanical property analyses, OM, SEM, EDS, XRD, hardness and impact tests were used. In accordance with the severity of the heat-treatment, the microstructure evolved from the untransformed martensite to the partially transformed dual phases of martensite and ferrite, and then fully transformed to ferrite. Impact values at ambient temperature for specimens isothermally heat-treated at 320 - 380°C, predominantly at about 350°C were lower than others’ with similar martensitic structure. The partially transformed specimens with dual phases of martensite and ferrite also showed lower impact values than samples with untransformed with martensitic, and transformed with ferritic structures.

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