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mills after extrusion and particle reinforcement. Key words: powder metal 7039 Al alloy; ballistic limit; microstructure; mechanical propertiesproperties of armor materials affect the ballistic... [15]. In this study, the powder metal 7039 Al alloy plates were joined by FSW. The microstructure and microhardness examinations were made on the samples taken from welding cross section......
; 7039铝合金是美国研制的一种中高强Al-Zn-Mg系铝合金,该具有优良的焊接性能与抗弹性能以及较好的加工成型性,目前作为炮架和装甲结构件被广泛应用[1-4] .对该系列合金在焊接及抗应力腐蚀方面的研究已有报道[5-6...升高,该波浪峰表现得越明显,该波浪形的出现是材料发生动态再结晶的表现[12]. 图1 7039铝合金热变形的正应力-真应变曲线 Fig.1 True stress-true strain curves of 7039 Aluminum alloy by hot compression: (a) 0.01 /s; (b) 0.1 /s; (c) 1 /s; (d......
; 7039铝合金是一种中高强Al-Zn-Mg系铝合 金,该合金具有优良的焊接性能,抗弹性能以及较好的加工成型性,作为炮架和装甲结构件被广泛应 用[1-3].Al-Zn-Mg系合金与其他铝合金相比,虽然强度较高,但是其抗腐蚀性能较差,在一定程度上...金组织和抗腐蚀性能的影响,并对其影响机理进行解释,认为合金的极化电阻越大,合金的抗剥落腐蚀性能越好.大量的研究结果表明:回归再时效(Retrogression and re-ageing treatment,RRA)可以在保持Al-Zn-Mg系铝合金强度不降低的前提下提高其抗应力腐蚀性能[7-9].在此,本文作者以7039铝合金为基础,研究了不同热处理制度(T6,T73和RRA)对合金在腐蚀液中浸......
by Largrane. Key words: 7039 aluminum alloy; penetration; Johnson-Cook constitutive model; microstructure 7039铝合金是一种具有优良的焊接性能,抗弹性能和加工性能的中高强Al-Zn-Mg系合金,被广泛应用于装甲结构材料[1-3].作为装甲材料通常要承受高应变速率的加载变形,而在高应变率加载条件下,材料的动态...,说明采用该数值模拟模型能够真实地反映子弹侵彻靶面的过程. 表1 4340钢和7039铝合金用于穿透模拟的材料参数 Table 1 Materials parameters for simulation of 4340 steel and 7039 Al alloy 图4 45°倾角斜贯穿时弹靶的网格分布 Fig.4 Mesh......
parts. AM opens a door for fast prototyping, great flexibility and customizing at low cost, driving weight and assembling reduction. Key words: automotive; powder metallurgy; lean alloy; Al alloy; Ti alloy; metal injection molding, additive manufacturing Cite this article as: TAN Zhao-qiang, ZHANG Qing, GUO Xue-yi, ZHAO Wei-jiang, ZHOU Cheng-shang, LIU Yong. New development of powder metallurgy......
of the deformed metal materials has been widely investigated, such as Al-Mg alloys after cold-working with the deformation degree of 80% [9,10], pure Mg [11], Mg-Cu-Mn alloy [12] and ultra-fine...Trans. Nonferrous Met. Soc. China 26(2016) 1176-1182 Low frequency damping behavior associated with sintering process in Al powder compact Gang-ling HAO, Xian-yu LI, Wei-guo WANG College of Physics......
, injection molding technology, etc[4]. The porosint made of spherical tungsten powder has more homogeneous pore, and air permeability of the product can be controlled easily. The spherical metal or alloy... spherical metal or alloy particles is very important to enhance the industry value and economy value of the powder, and expand its application area. 2 Experimental The raw powders used......
; accepted 13 July 2014 Abstract: 35% SiCp/2024 Al (volume fraction) composite was prepared by powder metallurgy method. The microstructures of SiCp/Al interfaces and precipitate phase/Al interfaces...; (3) LIU et al [8] prepared the oxidized SiCp/Al-Mg alloy composites by squeeze casting. MgAl2O4 forms on the surface and the interface action......
Laser surface cladding of ZM5 Mg-base alloy with Al+Y powder CHEN Chang-jun(陈长军), WANG Dong-sheng(王东生), WANG Mao-cai(王茂才) (State Key Laboratory for Corrosion and Protection, Institute of Metal Research,Chinese Academy of Sciences, Shenyang 110016, China) Abstract: The surface properties of ZM5 Mg-base alloy were modified by laser cladding with Al+Y powder. Laser cladding was carried out......
Laser rapid forming of low cost hydride-dehydride titanium alloy powder CHEN Jing(陈 静), ZHANG Feng-ying (张凤英), LIN Xin(林 鑫), TAN Hua(谭 华), HUANG Wei-dong(黄卫东) State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China Received 28 July 2006; accepted 15 September 2006 Abstract: Low cost hydride-dehydride (HDH) Ti-6Al-4V (Ti-64) alloy powder......