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Automatic recognition and quantitative analysis of Ω phases in Al-Cu-Mg-Ag alloyLIU Bing-bin(刘冰滨)1, GU Yan-xia(谷艳霞)2, LIU Zhi-yi(刘志义)2, TIAN Xiao-lin(田小林)1(1. Faculty of Information Technology, Macau.... More Ω phases would be recognized (growing rate minimum to 2% and maximum to 400% in samples), accuracy of recognition and statistics results would be greatly improved by using this method......
alloy is 230-410 ℃. The volume of the coarse equilibrium η phases that precipitated at grain boundaries and in the grains during isothermal-holding increases with the isothermal-holding time, which results in the decrease of subsequent aging hardening precipitates(GPII zones and η? phases) for loss of solutes and vacancies. The grain boundary precipitates tend to distribute continuously with wider......
Effects of Multiple Strengthening Treatments on Mechanical Properties and Stability of Nanoscale Precipitated Phases in an Aluminum-Copper-Lithium AlloyS.Ahmadi1,H.Arabi2,A.Shokuhfar31. Department... precipitated phases in an AA2090 alloy have been evaluated in this research.Various tests such as hardness,tensile,electrical resistance,differential scanning calorimetric(DSC),and transmission electron......
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with dimensions of 25 mm×25 mm×2.5 mm and 70 mm×60 mm×20 mm are (480 °C, 30 min) and (480 °C, 90 min), respectively. The densities of GP zones and η′ phases of the small specimen are higher than those of the large specimen, which is consistent with the properties of the alloys. Key words: aluminum alloy; specimen size; solution treatment; heating rate; hardening precipitate 1 Introduction Al-Zn-Mg-Cu......
J. Cent. South Univ. Technol. (2008) 15: 588-592 DOI: 10.1007/s11771-008-0110-z Microscopic phase-field simulation of Cr atom substitution character during formation of L12 and DO22 phases in Ni...; Abstract: The simulations of Cr atom substitution character during the formation of L12 and DO22 phases......
, ZANDBERGEN H W. Crystal structure of the orthorhombic U2-Al4Mg4Si4 precipitate in the Al-Mg-Si alloy system and its relation to the β″ and β′ phases[J]. Materials Science and Engineering A, 2005, 390: 127-138... alloy; weld; heat affected zone; mechanical properties; microstructure; precipitate 异质金属间的焊接,不论是在航空制造业,汽车制造业,还是在船舶制造业等,都有广泛的应用.在实际生产中,可以根据不同部位的承载和环境的情况,选择不同的材料以满足要求,这样不仅能减少制造成本,而且还能起到美观和减重的作用.因此,异质金属间的焊......
alloy; asymmetric twin-roll casting; deformation bands; precipitate 1 Introduction Twin-roll casting is a near-net-shape process, by which the plate with thickness of less than 10 mm can be produced...]. The Chinese Journal of Nonferrous Metals, 2008, 18(9): 1584-1589. (in Chinese) [12] TU Yi-fan, CHEN Jing-yi, ZHANG Bo-ping, LI Peng-xi, SUZUKIH G. Phases and microstructure of as-cast AZ31 magnesium......
dynamically precipitated at grain boundaries. Key words: Mg-Gd-Y alloy; ductility; multiaxial forging; microstructure; dynamic precipitate 1 Introduction There is increasing scientific and industrial...) and transmission electron microscope (TEM). The etching solution was 5% nitric acid in ethanol. Compositions of phases were analyzed by energy dispersive X-ray spectrometry (EDS) in the TEM mode. Foils......
