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A NEW TREATMENT FOR INTERFACE OF METAL ANDDIELECTRIC IN FDTD METHOD G.L.Jia1,J.C.He1,E.G.Wang1,B.W.Li1,Z.D.Qian1 (1.Key laboratory of National Education Ministry for Electromagnetic Processing of Materials, NortheasternUniversity, Shenyang 110006, China) Abstract:A new treatment for interface of metal and dielectric in finite-difference time domain(FDTD) method was presented, further how......
7475铝合金大型锻件时效工艺研究董显娟,李红英摘 要:测定了7475铝合金双级时效及回归再时效(RRA)状态下的拉伸性能和电导率,并通过标准三点弯曲试验和圆周切口圆柱试验测定了各时效状态下的断裂韧性,从而研究了双级时效和回归再时效对其力学性能,断裂韧性,电导率和微观组织的影响,结果发现回归再时效工艺并不适用于7475铝合金大型锻件的工业生产.关键词:7475铝合金;双级时效;回归再时效(RRA);断裂韧性;电导率;......
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Effect of heat treatment on microstructures and mechanical properties of extruded-rolled AZ31 Mg alloys QIU Wei(邱 玮)1, 2, HAN En-hou(韩恩厚)2, LIU Lu(刘 路)2 1. School of Energy and Power Engineering... January 2010 Abstract: The deformation behaviors of extruded-rolled (ER) AZ31 Mg alloys with different rolling reduction and heat treatment were investigated. The results show that the accumulation......
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℃, 24 h))后合金的TEM像 Fig. 5 TEM images of alloy after RRA treatment ((160 ℃, 2 h) and (120 ℃, 24 h)) with different pre-aging treatments 从图5中可以发现,经RRA处理后的晶界处的晶界析出相η粗大,呈断续状分布.从图5(a)欠时效RRA的TEM像中可以发现,再时效后...(b)). 图6 传统高温(200 ℃)RRA处理后合金TEM像 Fig. 6 TEM images of alloy after conventional high- temperature (200 ℃) RRA treatment 图6所示为传统高温RRA处理后合金TEM像.对比图5可以发现,虽然传统的高温RRA可有效增加GBP的离散程度,提高合金的耐蚀性能,但峰值时......
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