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) zones and a metastable η’ phase were observed by high-resolution transmission electron microscopy.The phenomenon of the second precipitation of the GP zones in samples subjected to DCT after being...Deep-cryogenic-treatment-induced phase transformation in the Al-Zn-Mg-Cu alloyChun-mei Li1,2,Nan-pu Cheng1,Zhi-qian Chen1,Ning Guo1,Su-min Zeng11. School of Materials Science and Engineering,Central......
Cerium dioxide with large particle size prepared by continuous precipitation李梅,王觅堂,柳召刚,胡艳宏,吴锦绣School of Material and Metallurgy,Inner Mongolia University of Science and Technology摘 要:precipitation of cerium oxalate(precursor of ceria) was carried out at different operational conditions such as reactant concentration......
″ nuclei) formed by pre-aging can inhibit the precipitation of GP zones during natural aging, and can quicken the precipitation of β″ phase in the early stage of subsequent artificial aging. Key words... by the precipitation of metastable precursors of the equilibrium β(Mg2Si) phase. The precipitation of these metastable precursors occurs in one or more sequences, which is quite complex and not fully......
Effects of indium on precipitation in Al-3.3Cu-0.8Li alloyZhengrong PAN , Ziqiao ZHENG, Zhongquan LIAO and Shichen LI School of Materials Science and Engineering, Central South University, Changsha 410083, China摘 要:The effects of 0.5 wt pct In on Al-3.3Cu-0.8Li alloy were studied. Instead of T1 (Al2CuLi) phase, there was an unknown cubic phase acting......
that the addition of Ce promotes the precipitation of η' phase, but it also partly retards the precipitation of GP zones. The density of precipitates decreases in a certain degree and rod-like η...]. Furthermore, WANG et al [10] found that addition of Ce into 2519 alloy can retard the formation of GP zones and promote the precipitation of denser and finer phase. CHAUBEY et al [11] studied......
: The influence of Ni-Mo fourth-nearest atomic interaction energy on the precipitation mechanism of Ni75Al14Mo11 alloy was investigated with the phase field model based on the microscopic diffusion equation...响的微观相场模拟[J]. 稀有金属材料与工程, 2009, 38(2): 286-290.ZHEN Hui-hui, WANG Yang-xin, CHEN Zheng, et al. Microscopic phase-field simulation for the effect of the fourth-nearest pair potentials on precipitation......
database. Key words: Mg-Al-Sm-Zn alloy; phase diagram; precipitation strengthening; mechanical properties; thermodynamic calculation 镁合金因其密度低,比强度和比刚度高等优良性质在汽车和电子通讯等领域有着广泛的应用[1].在常用的Mg-Al-Zn合金中添加稀土元素合金... investigation and thermodynamic calculation of the central part of the Mg-Al phase diagram [J]. Z Metallkd, 1998, 89(8): 536-540. [14] HUTCHINSON C R, NIE J F, GORSSE S. Modeling the precipitation......
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, combining with metallographic analysis, different phase zones were determined. Also, precipitation behavior of Nb at different phase zones was investigated under ultra fast cooling conditions. The experimental results showed that adopting a proper deformation temperature, the ultra fast cooling process can restrain the precipitation of Nb at austenite phase zone. More quantities and smaller size......
Intergrowth of C phase within μ phase in a Re-containing Ni-base single crystal superalloyShuang Gao1,2,Yizhou Zhou1,Zhi-Quan Liu1,Tao Jin11. Institute of Metal Research,Chinese Academy of Sciences2. Division of Energy and Environment,Graduate School at Shenzhen,Tsinghua University摘 要:Precipitation of topologically close-packed phases in a Re-containing......