The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Jun Gao - One of the best experts on this subject based on the ideXlab platform.
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effects of welding columnar grain orientation and strain rate on corrosion fatigue behavior of alloy 52 52m weld metal in high temperature water
Corrosion Science, 2021Co-Authors: Jun Gao, Jibo Tan, Ziyu Zhang, Ming Jiao, Lichen Tang, Yifeng HuangAbstract:Abstract Corrosion fatigue (CF) tests of Alloy 52/52 M weld metal from a safe-end welding joint of reactor pressure vessel were performed in B/Li high-temperature water. The CF cracks developed preferentially in 52 Mw with columnar grain orientation at a 45° - 75° angle to cyclic loading axis, rather than in 52b with columnar grain orientation parallel to loading axis. The environmental assisted fatigue effects were significant under lower strain amplitudes and the effect of strain rate on CF behavior was not significant. The CF Cracking Mechanism involved with welding columnar grain orientation is discussed.
Yifeng Huang - One of the best experts on this subject based on the ideXlab platform.
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effects of welding columnar grain orientation and strain rate on corrosion fatigue behavior of alloy 52 52m weld metal in high temperature water
Corrosion Science, 2021Co-Authors: Jun Gao, Jibo Tan, Ziyu Zhang, Ming Jiao, Lichen Tang, Yifeng HuangAbstract:Abstract Corrosion fatigue (CF) tests of Alloy 52/52 M weld metal from a safe-end welding joint of reactor pressure vessel were performed in B/Li high-temperature water. The CF cracks developed preferentially in 52 Mw with columnar grain orientation at a 45° - 75° angle to cyclic loading axis, rather than in 52b with columnar grain orientation parallel to loading axis. The environmental assisted fatigue effects were significant under lower strain amplitudes and the effect of strain rate on CF behavior was not significant. The CF Cracking Mechanism involved with welding columnar grain orientation is discussed.
Chuang Dong - One of the best experts on this subject based on the ideXlab platform.
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effect of solution treatment on stress corrosion Cracking behavior of an as forged mg zn y zr alloy
Scientific Reports, 2016Co-Authors: Shukun Wang, B J Wang, L Y Sheng, Enhou Han, Chuang DongAbstract:Effect of solid solution treatment (T4) on stress corrosion Cracking (SCC) behavior of an as-forged Mg-6.7%Zn-1.3%Y-0.6%Zr (in wt.%) alloy has been investigated using slow strain rate tensile (SSRT) testing in 3.5 wt.% NaCl solution. The results demonstrated that the SCC susceptibility index (ISCC) of as-forged samples was 0.95 and its elongation-to-failure (ef) was only 1.1%. After T4 treatment, the SCC resistance was remarkably improved. The ISCC and ef values of T4 samples were 0.86 and 3.4%, respectively. Fractography and surface observation indicated that the stress corrosion Cracking mode for as-forged samples was dominated by transgranular and partially intergranular morphology, whereas the Cracking mode for T4 samples was transgranular. In both cases, the main Cracking Mechanism was associated with hydrogen embrittlement (HE). Through alleviating the corrosion attack of Mg matrix, the influence of HE on the SCC resistance of T4 samples can be greatly suppressed.
Zumin Wang - One of the best experts on this subject based on the ideXlab platform.
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pure tungsten and oxide dispersion strengthened tungsten manufactured by selective laser melting microstructure and Cracking Mechanism
Additive manufacturing, 2020Co-Authors: Yanan Zhao, Kai Guan, Zumin WangAbstract:Abstract The microstructure and Cracking behavior of pure tungsten and micron- and nanosized Y2O3 dispersion strengthened tungsten fabricated by selective laser melting are comparatively studied in this work. The pure tungsten with high density (98.3 ± 0.3 %) is successfully fabricated by optimizing processing parameters, but there are still a few microcracks. The Cracking Mechanism of pure tungsten is attributed to the segregation of tungsten oxide impurities at the grain boundaries and the formation of high-angle grain boundaries. The agglomeration of Y2O3 occurs only in the tungsten with the addition of micron-Y2O3 while not in the tungsten with the addition of nanosized Y2O3. The addition of Y2O3 can reduce cracks due to the formation of a large number of low-angle twisted tungsten grains. The Cracking Mechanism of pure tungsten and the inhibition of Cracking by the addition of Y2O3 proposed in this work are of great significance for the SLM manufacture of high-performance and crack-free tungsten-based alloys. Our work may also provide relevant strategy for the suppression of crack in other alloys with high melting point by SLM.
Xinqiang Wu - One of the best experts on this subject based on the ideXlab platform.
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effect of grain boundary engineering on corrosion fatigue behavior of 316ln stainless steel in borated and lithiated high temperature water
Corrosion Science, 2019Co-Authors: Xinqiang WuAbstract:Abstract 316 L N stainless steels with different grain size and fraction of low-∑ coincidence site lattice boundaries were obtained by grain boundary engineering treatment. The effect of grain boundary character distribution and grain size on corrosion fatigue behavior of 316 L N stainless steel was investigated in borated and lithiated high-temperature water. It was found that the grain boundary engineering treatment increases fatigue life due to grain refinement rather than increased fraction of low-∑ coincidence site lattice boundaries. The low-∑ coincidence site lattice boundaries show no obvious resistance to transgranular Cracking. The grain size involved corrosion fatigue Cracking Mechanism is discussed.