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| 1 | On the γ' precipitates of the normal and inverse Portevin-Le Chatelier effect in a wrought Ni-base superalloy显示文摘The Portevin-Le Chatelier(PLC) effects in a wrought Ni-base superalloy with different γ' precipitates contents have been investigated. Detailed analysis on the serration type of the tensile curves indicates that the γ' precipitates have a decisive influence on the transformation from normal to inverse PLC behavior, which is rarely proposed in other works. It is considered that the γ' precipitates play the same role in PLC effect as temperature and strain rate for the investigated wrought Ni-base superalloy. | Xinguang Wang Guoming Han Chuanyong Cui Shuai Guan Jinguo Li Guichen Hou Yizhou Zhou Xiaofeng Sun | 2019 | Journal of Materials Science & Technology2019，35，1： | 3 |
| 2 | 显示文摘 | Yu Jinjiallg Sun Xiaofeng Hou Guichen | 2003 | Journal of Iron and SteelResearch2003，15，7： | 1 |
| 3 | Effect of Substrate Characteristics on Interdiffusion Coefficients of Ni and Al Atoms in β-NiAl Phase of Aluminide Coatings显示文摘Interdiffusion coefficients at 950℃ and 1050℃ are calculated by Wagner analysis method as a function of composition of β-NiAI phase. Theβ-NiAI phase is formed by pack cementation on surface of superalloy. Results of the calculation show that interdiffusion coefficients inβ-NiAI phase strongly depend on the compositions and vary over several orders of magnitude. Compared with the interdiffusion coefficients in the stoichiometricβ-NiAI phase, the interdiffusion coefficients in β-NiAI phase formed on superalloy is obviously small, probably due to the composition, complicated microstructure and precipitates. However, it could be seen clearly that the shapes of the diffusivity curves are very similar to each other. The similarity of the diffusion curves and the difference between interdiffusion coefficients imply that the compositions, microstructures and precipitates of superalloy have a distinctly adverse effect on the interdiffusion of Ni and Al atoms during aluminization, but do not change the essential characteristics of β-NiAI phase. | Hua WEI, Xiaofeng SUN, Qi ZHENG, Guichen HOU, Hengrong GUAN and Zhuangqi HUInstitute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China | 2004 | Journal of Materials Science & Technology2004，20，2： | 1 |
| 4 | A Finite Difference Method for Determining Interdiffusivity of Aluminide Coating Formed on Superalloy显示文摘A numerical method has been developed to extract the composition-dependent interdiffusivity from the concentration profiles in the aluminide coating prepared by pack cementation. The procedure is based on the classic finite difference method (FDM). In order to simplify the model, effect of some alloying elements on interdiffusivity can be negligible.Calculated results indicate the interdiffusivity in aluminide coating strongly depends on the composition and give the formulas used to calculate interdiffusivity at 850, 950 and 1050℃. The effect on interdiffusivity is briefly discussed. | Hua WEI, Xiaofeng SUN, Qi ZHENG, Guichen HOU, Hengrong GUAN and Zhuangqi HUState Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China | 2004 | Journal of Materials Science & Technology2004，20，5： | 1 |
| 5 | Evolution of TCP Phase During Long Term Thermal Exposure in Several Re-Containing Single Crystal Superalloys显示文摘The application and component designs of single crystal superalloys are restricted by the precipitation of topologically closed packed(TCP)phases,which can deteriorate the microstructural stability of the alloys severely.Limited researches concerning the type and morphology evolution of TCP phases under elevated temperature conditions have been reported previously.In the present work,three Re-containing single crystal alloys were designed to investigate TCP phase evolution via long term isothermal exposure tests at 1120℃while the effects of Re on the microstructural characteristic and elements segregation were also clarified.The results showed that the addition of Re increased the instability of the alloys and the volume fraction of the TCP phases exceeded 5 vol%when the Re content reached 3 wt%.The increasing Re content had also raised the precipitation temperature of TCP phases but it did not change the type of them after long term aging;all the TCP particles were identified asμphase in this study.Moreover,the elements segregation became considerably serious as Re addition increased constantly,which brought about various morphologies of theμphase in the experimental alloys.In particular,the rod-like and needle-likeμphases demonstrated the typical orientation withinγmatrix while the blockyμphase was dispersedly distributed in the space.No specific orientation relationship could be observed in theμphase when the addition of Re exceeded certain threshold value. | Zihao Tan Lin Yang Xinguang Wang Yunling Du Lihua Ye Guichen Hou Yanhong Yang Jinlai Liu Jide Liu Jinguo Li Yizhou Zhou Xiaofeng Sun | 2020 | Acta Metallurgica Sinica(English Letters)2020，33，5： | 1 |
| 6 | XPS and PAT Study on NiAl Phase Formed in a Superalloy by Pack Cementation显示文摘包硬化(PC ) 在五分钱库 superalloywas 上准备的 NiAl 阶段由 X 光检查光电子光谱学(XPS ) 和正电子歼灭技术调查了(轻拍) 。焦点在从 Ni (艾尔) 2p 山峰的底层在束缚能和在 asuperalloy 形成的 NiAl 阶段的空缺集中的 alloying 的稳固的答案的效果上。结果证明在 asuperalloy 种的 NiAl 阶段的 Ni 2p 山峰的束缚能被多达 1,09 eV 被多达 0.55 eV 与形成的 NiAl 阶段比较向更高的精力和艾尔 2p 山峰的束缚能从 850~1050 °C 在温度转移在纯 Ni 。从在超级合金形成的 NiAl 阶段获得的正电子一生被发现比理论价值显著地低,显示在空缺集中的减少。束缚能和空缺集中的变化是可能由于 thes 从进 NiAl 格子的底层的 alloying 原子的臭答案, | Hua WEI Guichen HOU Xiaofeng SUN Qi ZHENG Hengrong GUAN Zhuangqi HU | 2006 | Journal of Materials Science & Technology2006，22，6： | 0 |
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