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多向锻造7075铝合金的结构和性能 李忠奎1,张小明1,张廷杰1,田锋1 (1.西北有色金属研究院,陕西西安,710016) 摘要:在440℃经多向锻造加工成7075铝合金锻件.研究了锻件的显微组织和力学性能随退火温度和T73回火的变化,TEM和SEM用于分析锻件的晶粒和第二相形态.多向和大变形锻造产生平均晶粒尺寸18μm的完全再结晶组织.390℃~450℃退火使晶粒长大到3μm,但位错和第二相分布没有明显改变,这时锻件展现出较低强度和较高延性.T73回火使锻件屈服强度和拉伸强度分别提高280%和210%,而延性同退火样相比并无明显下降,断裂韧性达到51MPa,可以认为这是沉淀强化的贡献. 关键词:7075铝合金; 多向锻造; 显微组织; 力学性能; 7075 aluminum alloy; multi-directional forging; microstructure......
双峰时效对7075合金组织与性能的影响 赵坚1,宋仁国1,何源1,李红霞1,陈小明1 (1.浙江工业大学机械制造及自动化教育部重点实验室,杭州,310014) 摘要:采用洛氏硬度计,显微硬度计,光学显微镜(OM),电子拉伸试验机等技术对7075铝合金时效行为,力学性能及显微组织进行了系统研究.结果表明,7075合金的硬度及强度都具有时效双峰特征.两个时效峰的硬度和强度相差很小,在较低温度下时效第二峰的强度,硬度,塑性,韧性较高. 关键词:7075合金; 双峰时效; 组织; 性能; 7075 alloy; Double-peak aging; Microstructure; Property; [全文内容正在添加中] ......
Trans. Nonferrous Met. Soc. China 24(2014) 2150-2156 Effects of rolling parameters of snake hot rolling on strain distribution of aluminum alloy 7075 Tao ZHANG1,2, Yun-xin WU1,2, Hai GONG1,2, Xi-zhao... distribution of 7075 aluminum alloy plate during snake rolling and symmetrical rolling were analyzed in Deform 3D. Effects of velocity ratio, offset distance between two rolls and pass reduction......
electromagnetic stirring for a modified 7075 alloy[J]. Materials Science Forum, 2013, 765: 175-179. [12] WANG H J, XU J, KANG Y L, TANG M O, ZHANG Z F. Study on inhomogeneous characteristics and optimize...; 勤, 崔建忠. 7075铝合金CREM法半连铸坯中溶质元素的宏观分布[J]. 金属学报, 2003, 39(12): 1264-1268. ZHANG Qin, CUI Jian-zhong. Macro-distribution of solute elements in 7075 aluminum alloy ingots produced by CREM process[J]. Acta......
: continuous casting and rolling; 7075 Al alloy; roll speed difference; microstructure; mechanical properties; texture; anisotropy 1 Introduction Having high strength and good corrosion resistance, 7000 series...) operation on the mechanical properties of finally rolled 7075 Al alloy. The present research work was concerned with simultaneous continuous casting and rolling process of this alloy. With this regard......
Trans. Nonferrous Met. Soc. China 24(2014) 1836-1843 Simulation on deposition and solidification processes of 7075 Al alloy droplets in 3D printing technology Hai-peng LI1, He-jun LI1, Le-hua QI2... the drop-on-demand three dimensional (3D) printing method, based on the volume of fluid (VOF) method, a 3D numerical model was employed. In this model, the 7075 alloy with larger temperature range......
. Key words: Al 7075 alloy; Mg AZ31 alloy; diffusion bonding; intermetallic compounds; interfacial transition zone; microstructure; mechanical properties 1 Introduction Aluminum and its alloys are widely... occurred between Al3Mg2 and Al12Mg17 layers. Figure 11(b) shows SEM images of fracture surface of the Al 7075 alloy. In this case, the river pattern is observable, which suggests also a brittle fracture......
: The microstructure and property before and after heat treatment of friction stir welded 5 mm aero 7075 aluminum alloy were investigated. The results show that when the rotating speed of stirring joint... for 7075 aluminum alloy occurs in the TMAZ. Key words: 7075 aluminum alloy; friction stir welding; microstructure ......
, the transition layer becomes stable, which determines the reinforced wear resistance of the as-extruded composites. Key words: 7075 alloy; Al2O3p; composites; hot extrusion; microstructure; tribological behavior... attempts have been made to analyze the influences caused by hot extrusion and Al2O3p ceramic reinforcement particles on 7075 alloy. In the current study, the as-cast and as-extruded Al2O3p/7075 composites......
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