共搜索到8515条信息，每页显示10条信息，共852页。用时：0小时0分0秒623毫秒
materials was chosen for further investigation of the precipitate structure by transmission electron microscopy (TEM) to explain the differences in mechanical properties. Key words: aluminium; microstructure; precipitate free zone; mechanical properties 1 Introduction In the heat-treatable aluminium alloys, the mechanical properties are strongly dependent on the microstructure obtained during the thermo......
%). It is found that the microstructure of the AZ31 alloy without Sr is mainly composed of the primary α-Mg and β-Mg17Al12 phases which precipitate along interdendritic; the dendritic arm spacing and grain... As-cast microstructure and Sr-containing phases of AZ31 magnesium alloys with high Sr contents WU Lu1, PAN Fu-sheng1, YANG Ming-bo2, WU Ju-ying1, LIU Ting-ting1 1. National Engineering Research......
编号:1672-7207(2015)07-2439-07 Effect of ultrasonic field on matrix structure and secondary phases of 7085 aluminum alloy HUANG Mingzhe, LI Xiaoqian, JIANG Ripeng, NING Jiajie (State Key Laboratory... and secondary phases were investigated by optical microscopy (OM), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). The results show that compared with the ingot casted......
and Engineering, Jilin University, Changchun 130022, China) Abstract: The thermodynamics equilibrium phases of Mg-Al-Ti system were worked out to be Al-Ti intermetallics by computing program of Miedema.... The phases and microstructure of the composites were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS).The fine particulates of Al3Ti......
, Fe and Mn. After 530 ℃/36 h treatment, dendritic structure is eliminated, most of coarse bond shape secondary phases redissolve into matrix, and the grain size of the remained dot or stick shape phases which contained Cu, Fe and Mn are small (＜5 μm). Key words: 2099 Al-Li alloy; homogenization process; dendritic structure; secondary phases 铝锂合金具有比强度高和比刚度高,疲劳裂纹扩展速率低和高,低温性能较好等特点,广泛应用于航天航空领域,成为减轻飞行......
> Microstructure and mechanical properties of enhanced solution treated 7075 and 2024 aluminum alloys Abstract: The effects of enhanced solution of second phases... the multi phase eutectic temperature without the formation of overheated microstructure, and improve the second phase solution. In contrast to alloy 2024, the second phases in alloy 7075 can dissolve more......
Evolution of intermetallic phases of Al-Zn-Mg-Cu alloy during heat treatment FAN Xi-gang(樊喜刚)1, JIANG Da-ming(蒋大鸣)1, MENG Qing-chang(孟庆昌)1, LI Nian-kui (李念奎)2, SUN Zhao-xia(孙兆霞)2 1. Analysis... the age-hardening potential and resistance to the corrosion cracking of the alloys[1-2]. However, coarse intermetallic particles (0.5-10 μm) such as Al7Cu2Fe and S (Al2CuMg) phases are present......
, MUDDLE B C. Characterization of strengthening precipitate phases in a Mg-Y-Nd alloy [J]. Acta Mater, 2000, 48: 1691-1703. [10] HENES S, GEROLD V. Roentgenographic investigation of the separation.... The plate-shaped β exhibits (0001)α//(111)β, deviates by about 9? from (OR-4, a new OR). Key words: Mg-Sn alloy; crystallography; Mg2Sn precipitate; orientation relationship ......
HYDRATION PHASES IN MAGNESIUM OXYCHLORIDE CEMENT PASTE AND THEIR INFLUENCE ON THE STRENGTH INDEX崔可浩,崔崇,易海云摘 要:<正> The study is for the purpose of synthesis-ing the pure phases of magnesium oxychloridecement and investigating the basic hydrationphases and the patterns of phase changes.Theresults suggest that the artificial synthesisbased......
......
