5083铝合金H321状态厚板生产工艺研究

研究了加工率、稳定化退火温度及保温时间对板材组织与性能的影响，确定了5083铝合金H321状态板材的生产工艺。结果表明。其性能指标达到ASTMB209标准的规定。     

5A06-H34厚板生产工艺研究

研究了加工率、稳定化退火温度及保温时间对5A06铝合金板材组织与性能的影响,确定了5A06铝合金H34状态的生产工艺。结果表明,其性能指标达到GJB390标准。     

5754-H32厚板工艺研究

研究了加工率、稳定化退火温度及保温时间对板材组织与性能的影响，确定了5754铝合金H32状态的生产工艺。结果表明．性能指标达到EN485标准的要求。     

5083-O铝合金管材生产工艺研究

研究了不同冷变形程度、退火温度、保温时间对5083-O铝合金管材组织与性能的影响,确定了退火状态管材的生产工艺及热处理制度.在工业生产条件下使其管材的技术指标达到用户的要求.     

5754-H34铝合金板材生产工艺研究

研究了不同冷变形程度，退火温度对5754铝合金冷轧板材的组织和力学性能的影响，确定了5754合金H34状态板材的生产工艺参数，即冷变形程度25%-45￥，稳定化退火温度120-160℃，保温时间3-6h，在工业生产条件下，其产品的技术指标达到了用户要求。     

5754铝合金板材H2n状态工艺研究

研究了加工率，退火温度，保温时间对板材组织与性能的影响，确定了5754铝合金H2n状态的生产工艺及热处理制度，结果表明，其性能指标达到EN485标准。     

5052铝合金大卷材生产工艺研究

研究了5052铝合金大卷材的退火温度、保温时间对其组织与性能的影响,确定了5052铝合金O、H24状态卷材退火热处理工艺制度.试验结果表明,按所制定的退火制度生产的产品的性能指标达到GB/T3880-1997标准规定值.     

5A05铝合金O状态板材质量攻关

研究了冷轧加工率、退火温度、保温时间对板材组织与性能的影响，确定了5A05铝合金O状态板材的冷轧工艺和热处理制度。按照所确定的工艺制度生产的板材，其性能达到GB／T3880-1997标准中的规定，并且板材的质量稳定。     

大直径5A02铝合金薄壁管材生产工艺的研究

采用LD60三辊精密管材轧机对5A02铝合金管坯进行了轧制,利用光学显微镜、硬度计和万能试验机分析了冷加工率、中间退火温度及保温时间对5A02铝合金薄壁管材组织及性能的影响.确定了5A02铝合金溥壁管材在轧制中选择57.2%作为第一道次加工率,在380～410℃时退火保温30～60 min后组织性能较好;轧制后的成品管...     

超快速加热退火下保温时间对5083铝合金组织及力学性能的影响

利用Gleeble-3500热模拟系统和电子背散射衍射(EBSD)技术对5083铝合金超快速退火组织的演变规律进行了研究,探讨了5083铝合金经过80％冷轧变形后以500℃/s加热至450℃时,不同保温时间(1～60 s,冷却速度40℃/s)对退火组织及力学性能的影响.结果表明,随退火保温时间从1 s延长到60 s,5...     

Joint performance of CO2 laser beam welding 5083,H321 aluminum alloy

Laser beam welding of aluminum alloys is expected to offer good mechanical properties of welded joints. In this experimental work reported, CO2 laser beam autogenoas welding and wire feed welding are conducted on 4 mm thick 5083- H321 aluminum alloy sheets at different welding variables. The mechanical properties and microstructure characteristics of the welds are evaluated through tensile tests, micro-hardness tests, optical microscopy and scanning electron microscopy （SEM）. Experimental results indicate that both the tensile strength and hardness of laser beam welds are affected by the constitution of filler material, except the yield strength. The soften region of laser beam welds is not in the heat-affected zone （ HAZ ）. The tensile fracture of laser beam welded specimens takes place in the weld zone and close to the weld boundary because of different filler materials. Some pores are found on the fracture face, including hydrogen porosities and blow holes, but these pores have no influence on the tensile strength of laser beam welds. Tensile strength values of laser beam welds with filler wire are up to 345.57 MPa, 93% of base material values, and yield strengths of laser beam welds are equivalent to those of base metal （264. 50 MPa）.     

5083铝合金H2n状态板材退火工艺研究

研究了退火温度及保温时间对5083铝合金板材组织与性能的影响,退火温度对该板材抗剥落腐蚀性能的影响,板材硬度的变化规律.确定了5083-H2n板材的退火工艺制度.     

Hot stamping of AA5083 aluminium alloy sheets

The paper is aimed at proving the feasibility of producing sheet components by stamping AA5083 sheets at elevated temperature and strain rate. Laboratory tensile and Nakajima-type tests were carried out to evaluate the material flow stress, ductility and fracture limits sensitivity to temperature and strain rate, and therefore to determine the optimal combination of process parameters assuring both maximum formability and effective post-deformation mechanical properties. Industrial trials were conducted on an automotive component to validate the laboratory results.     

化学成分对5083铝合金性能的影响

分析了合金成分特别是Mg、Mn主元素对5083铝合金性能的影响,提出了在既确保材料的力学性能,又使其具有良好工艺性能和耐蚀性的成分控制范围。     

Statistical Analysis of High-Cycle Fatigue Behavior of Friction Stir Welded AA5083-H321

A review of the literature revealed that high-cycle fatigue data associated with friction stir-welded (FSW) joints of AA5083-H321 (a solid-solution-strengthened and strain-hardened/stabilized Al-Mg-Mn alloy) are characterized by a relatively large statistical scatter. This scatter is closely related to the intrinsic variability of the FSW process and to the stochastic nature of the workpiece material microstructure/properties as well as to the surface condition of the weld. Consequently, the use of statistical methods and tools in the analysis of FSW joints is highly critical. A three-step FSW-joint fatigue-strength/life statistical-analysis procedure is proposed in this study. Within the first step, the type of the most appropriate probability distribution function is identified. The parameters of the selected probability distribution function, along with their confidence limits, are computed in the second step. In the third step, a procedure is developed for assessment of the statistical significance of the effect of the FSW process parameters and fatigue specimen surface conditions. The procedure is then applied to a set of stress-amplitude versus number of cycles to failure experimental data in which the tool translational speed was varied over four levels, while the fatigue specimen surface condition was varied over two levels. The results obtained showed that a two-parameter weibull distribution function with its scale factor being dependent on the stress amplitude is the most appropriate choice for the probability distribution function. In addition, it is found that, while the tool translational speed has a first-order effect on the AA5083-H321 FSW-joint fatigue strength/life, the effect of the fatigue specimen surface condition is less pronounced.     

Friction stir welding of magnesium alloy AZ31B to aluminium alloy 5083

Abstract

A preliminary investigation has been carried out into the application of friction stir welding for joining a magnesium alloy to an aluminium alloy. The work has shown that liquation during the welding process can lead to the formation of a brittle intermetallic at the joint interface. This intermetallic has a microstructure composed of a divorced lamellar eutectic containing Al₁₂Mg₁₇ and magnesium. The formation of this microstructure and its influence on mechanical properties are discussed in terms of solidification theory.     

5083铝合金板材表面裂纹产生原因分析

为了查明某批次5083铝合金板材表面出现的裂纹的本质及形成的原因,在带有裂纹的板材上取样进行试验研究。通过宏观组织和显微组织检查,以及能谱分析,结果表明,由于铸锭表面存在一定深度和长度的凹痕处聚集了氧化物和非金属元素,造成铸锭经轧制后在板材上形成了贯通其表面的裂纹。     

均匀化处理对5083铝合金铸锭组织与性能的影响

通过常温拉伸试验、硬度检测、电导率检测以及扫描电镜金相分析,对比分析不同工艺均匀化处理后5083铝合金铸锭的组织与性能,发现不同均匀化热处理工艺对铸锭的微观组织与性能有显著的影响。研究结果表明,通过420  ℃×2 h→510 ℃×10 h的双级均匀化处理后,合金获得最优的微观组织与综合力学性能。