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on the seeded precipitation rate of sodium aluminate solution, particle size distribution (PSD) and morphology of precipitated gibbsite were investigated using titration method, particle size analyzer and scanning electron microscope (SEM), respectively. The results show that the two additives can accelerate the seeded precipitation rate of sodium aluminate solution. At relatively high concentration......
important factor to gibbsite precipitation rate. The Mulliken atomic charges of oxygen atoms of the additives and the corresponding precipitation ratio in 10 h are listed in Table 1. Table 1 Oxygen... into the liquor. Concerning the enhancement mechanism of agglomeration by the additives, there are several possibilities. Firstly, agglomeration efficiency is promoted by high precipitation rate......
Effect of solution cooling rate on the γ′ precipitation behaviors of a Ni-base P/M superalloyGaofeng Tian, Chengchang Jia, Ying Wen, and Benfu Hu School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China摘 要:The effect of cooling rate on the cooling γ′ precipitation behaviors was investigated in a Ni......
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ratio(Ks) 0.25 or 0.5, and precipitation time 10 h.3 Results and discussion 3.1 Effect of α-alanine on seeded precipitation rate of sodium aluminate solution The effect of α-alanine on the seeded precipitation rate of sodium aluminate solution is shown in Fig.1. It is indicated that, compared with the blank, α-alanine at certain concentrations has the inhibitory effect at the initial period......
Microscopic phase-field simulation for precipitation behavior of Ni-Al-Cr alloy during two-step aging ZHANG Ji-xiang(张济祥), CHEN Zheng(陈 铮), LIANG Min-jie(梁敏洁), WANG Yong-xin(王永欣), LAI Qing...; Abstract: Based on the microscopic phase-field model, the pre-aging temperature effects on the precipitation mechanism and microstructure evolution during two-step aging for Ni75Al9Cr16 alloy were......
Microscopic phase-field simulation coupled with elastic strain energy for precipitation process of Ni-Cr-Al alloys with low Al content LU Yan-li(卢艳丽), CHEN Zheng(陈 铮), LI Yong-sheng(李永胜), WANG...; Abstract: The precipitation process of Ni-Cr-Al alloy with low Al content was studied at atomic scale based on the microscopic phase-field kinetic model coupled with elastic strain energy. The aim......
], [C] and [N] versus temperature. The precipitation rate of Ti(C, N) can be fast when Ti content in steels is 0.112% and the temperature is in the range of 1000–1300 °C. The same time the N element...J. Cent. South Univ. (2017) 24: 2767-2772 DOI: https://doi.org/10.1007/s11771-017-3690-7 Precipitation behavior of Ti in high strength steels WU Si-wei(吴思炜), LIU Zhen-yu(刘振宇), ZHOU Xiao-guang(周晓光......
and artificial aging treatment were established in order to optimize precipitation strengthening conditions intended to enhance the strength of Al alloys. Slow strain rate tests (SSRT) at various... properties, and thus this range is considered to be a corrosion prevention range. Key words: Al alloy; slow strain rate test; electrochemistry; precipitation strengthening heat treatment; mechanical......
