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cracks initiated during operation induce the lubrication oil leak and serious safety hazard. Microstructural heterogeneity, including shrinkage/gaspores and secondary phase particles, is the most... conditions. This paper reviews the influences of shrinkage/gaspores and secondary phase particles, formed during casting process, on the fatigue life of Al-Si-Mg cast Al alloys. Key words: cast aluminum......
A Study on La2O3-Y2O3-Mo Secondary Emission Material 周美玲1,张久兴1,王金淑1,李洪义1,刘娟1,左铁镛1 (1.Key Laboratory of Advanced Functional Materials of Ministry of Education, School of Materials Science and Engineering, Beijing Polytechnic University, Beijing 100022, China) Abstract:The substrate molybdenum doped with La2O3, Y2O3 cathode material was made by the powder metallurgy method. The secondary......
with plasticity. Key words: SP-700 titanium alloy; solution treatment; aging treatment; secondary α phase 钛合金具有密度小,强度高,耐高温和抗腐蚀性强等优点,在航空航天领域中得到了广泛应用[1].航空航天领域常用的Ti-6Al-4V具有较强的疲劳抗力和较好的断裂韧性,但是,由于其加工性能和可热处理性... solution temperature due to the fact that the number of secondary α increases. To control aging temperature and aging time can control the shape and size secondary α, to obtain the optimum combination......
Trans. Nonferrous Met. Soc. China 25(2015) 1334-1340 Secondary reaction mechanism of leaching process of calcium aluminate slag Hui-lan SUN1,2, Bo WANG1,2, Jian-xin ZHANG1, Shu-feng ZONG1, Jia-jia... stable than β-2CaO·SiO2. However, it is decomposed by sodium carbonate solution during leaching process, leading to the secondary reaction. The extent of secondary reaction and reaction mechanism......
3D anisotropy simulation of dendrites growth with phase field method HOU Hua(侯 华)1, ZHAO Yu-hui(赵宇辉)2, NIU Xiao-feng(牛晓峰)1 1. College of Materials Science and Engineering, North University...: The anisotropy problem of 3D phase-field model was studied, and various degrees of anisotropy were simulated by numerical calculation method. The results show that with the change of interface......
in the literature. There is also some missed idle times during the waiting phase when secondary user finds the channel busy. Therefore, the longer the transmission time is, the higher the successfully delivered... to PU re-occupancy is modelled in successful transmitted time and in collision probability. Moreover, we derive secondary user’s packet delay distribution using phase type model at which retransmission......
MONTE CARLO SIMULATION OF SPIN-POLARIZED SECONDARY ELECTRONS FROM IRON H.M Li1,Z.J.Ding1,Z.M.Zhang1,X. Sun1,W.S. Tan1,K. Salma1 (1.Hefei National Laboratory for Physical Sciences at Microscale.... The energy distribution of the secondary electron polarization and the primary energy dependence of the polarization from Fe are studied. The simulation results show that:(1) the intensity of the spin......
Trans. Nonferrous Met. Soc. China 20(2010) s774-s780 Experimental studies and phase field modeling of microstructure evolution during solidification with electromagnetic stirring P... of the process was performed using phase-field modeling of alloy solidification in order to gain insight into the process of morphological changes of a solid during this process. A non-isothermal alloy......
Co3Ta和Co3Ti相. 图7 2Ti合金900 ℃时效300 h二次相的面扫描分析[25] Fig. 7 Secondary phase scanning analysis of 2Ti alloy after aging treatment at 900 ℃ for 300 h [25] 图8 5种合金900 ℃时效100 h的XRD谱[15] Fig. 8... University of Technology, Baiyin 730900, China) Abstract: With the changing of aging time and temperature, the microstructure, coarsening behavior of γ′ phase and secondary phase precipitation......