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Oxidation behavior of high-strength FeCrAl alloys in a high-temperature supercritical carbon dioxide environment
Publication date: Available online 28 November 2018Source: Progress in Natural Science: Materials InternationalAuthor(s): Hongsheng Chen, Sung Hwan Kim, Chongsheng Long, Chaewon Kim, Changheui JangAbstractThe oxidation behavior of three high-strength FeCrAl alloys was investigated in supercritical carbon dioxide environment at 650 °C. After exposure for 500 h, the weight gains of the FeCrAl alloys gradually decreased with increasing Al content. The oxide scales are primarily composed of α-Al2O3 and spinel oxides. With increasing Al content, the amount of α-Al2O3 increases and the C content decreased in the oxide sca...
Source: Progress in Natural Science: Materials International - November 29, 2018 Category: Materials Science Source Type: research

Mechanical characterization and strain-rate sensitivity measurement of Ti-7333 alloy based on nanoindentation and crystal plasticity modeling
Publication date: Available online 28 November 2018Source: Progress in Natural Science: Materials InternationalAuthor(s): Mengqi Zhang, Jinshan Li, Bin Tang, Hongchao Kou, Jiangkun FanAbstractThe relationship between crystal orientations and meso-mechanical properties of β phase Ti-7333 titanium was investigated through the combination of nanoindentation experiments and simulation. The crystal plasticity finite element (CPFE) model for nanoindentation of single body-centered cubic crystal was established based on the experimental data. And the crystal plasticity constitutive law was implemented to simulate the nanoindenta...
Source: Progress in Natural Science: Materials International - November 29, 2018 Category: Materials Science Source Type: research

Mechanical, deformation and fracture behaviors of bulk metallic glass composites reinforced by spherical B2 particles
Publication date: Available online 28 November 2018Source: Progress in Natural Science: Materials InternationalAuthor(s): Sung Hwan Hong, Jeong Tae Kim, Jin Man Park, Gian Song, Wei-Min Wang, Ki Buem KimAbstractTi45Cu40Ni7Zr5Sn2.5Si0.5 alloys were prepared under various cooling rate conditions during solidification. The alloys exhibited different volume fractions of B2 particles with 0 ~ 40 vol% in an amorphous matrix. Monolithic bulk metallic glass of 1 mm diameter showed no macroscopic plasticity and exhibited the typical vein patterns in a maximum shear stress plane on the fracture surface. However, a bulk metallic ...
Source: Progress in Natural Science: Materials International - November 29, 2018 Category: Materials Science Source Type: research

Thermal atomic layer etching: Mechanism, materials and prospects
Publication date: Available online 28 November 2018Source: Progress in Natural Science: Materials InternationalAuthor(s): Chang Fang, Yanqiang Cao, Di Wu, Aidong LiAbstractIn the semiconductors and related industries, the fabrication of nanostructures and nanopatterns has become progressive demand for achieving near-atomic accuracy and selectivity in etching different materials, particularly in ultra-thin gate dielectrics and ultra-thin channels used in field-effect transistors and other nanodevices below 10 nm scale. Atomic layer etching (ALE) is a novel technique for removing thin layers of material using sequential an...
Source: Progress in Natural Science: Materials International - November 29, 2018 Category: Materials Science Source Type: research

Effect of cold rolling process on microstructure and mechanical properties of high strength β titanium alloy thin sheets
Publication date: Available online 29 November 2018Source: Progress in Natural Science: Materials InternationalAuthor(s): Yan Ma, Zhaoxin Du, Xiaoming Cui, Jun Cheng, Guolong Liu, Tianhao Gong, Huimin Liu, Xiaopeng Wang, Yuyong ChenAbstractThe microstructure and mechanical properties of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe high strength titanium alloy sheets prepared by unidirectional cold rolling and two-step cross cold rolling were investigated. Results showed that the β phase grains were refined significantly by cold rolling followed by solution treatment for a short time. Compared to unidirectional cold rolling, the short ti...
Source: Progress in Natural Science: Materials International - November 29, 2018 Category: Materials Science Source Type: research