CAJ | 학술논문

目的：采用新型复合大塑性变形技术正挤压-等径角挤压工艺( FE-ECAP),研究5052铝合金在室温条件下的变形行为。方法基于有限元分析软件DEFORM-3D,在FE-ECAP工艺下对5052铝合金进行有限元模拟,研究变形过程中挤压载荷、等效应变、金属流动速度等场量的分布规律。结果5052铝合金在FE-ECAP变形过程中,挤压载荷曲线呈双峰形态分布,在挤压模口附近达到第一次峰值,第二次出现在转角处,挤压载荷值为347 kN,同时也是整个挤压过程的最大值；经过FE-ECAP变形后,等效应变大量累积,使得主要变形区达到了高度均匀的变形状态；坯料外转角处金属的流动速度值大于内转角处的流动速度值。结论根据以上结果分析,在FE-ECAP工艺下,为使变形坯料性能优越,应尽量提高坯料变形的均匀性。
목적：채용신형복합대소성변형기술정제압-등경각제압공예( FE-ECAP),연구5052려합금재실온조건하적변형행위。방법기우유한원분석연건DEFORM-3D,재FE-ECAP공예하대5052려합금진행유한원모의,연구변형과정중제압재하、등효응변、금속류동속도등장량적분포규률。결과5052려합금재FE-ECAP변형과정중,제압재하곡선정쌍봉형태분포,재제압모구부근체도제일차봉치,제이차출현재전각처,제압재하치위347 kN,동시야시정개제압과정적최대치；경과FE-ECAP변형후,등효응변대량루적,사득주요변형구체도료고도균균적변형상태；배료외전각처금속적류동속도치대우내전각처적류동속도치。결론근거이상결과분석,재FE-ECAP공예하,위사변형배료성능우월,응진량제고배료변형적균균성。
The aim of this work was to use the new type of sever plastic deformation technology called Forward extru-sion-equal channel angular pressing ( Forward extrusion-equal channel angular pressing, FE-ECAP) to study the deforma-tion behavior of 5052 aluminum alloy at room temperature. Based on the DEFORM-3D finite element simulation software, the deformation behavior of 5052 aluminum alloy was simulated under the FE-ECAP technology, and the squeezing load, e-quivalent strain and the distribution of velocity during the process of deformation were studied. During the FE-ECAP de-formation process, the pressing load curve showed a distribution of double-mountain shape, the first peak value occurred a-round the mouth of the pressing die, the second one appeared at the corner, and the value of extrusion load reached 347 kN, which was the maximum value in the whole deformation process. After FE-ECAP deformation, the effective strain mas-sively accumulated, which made the main deformation area reached a high degree of highly uniform deformation condition. The metal flow velocity at the outer corner of the billets was larger than the value of flow velocity at the inner corner. Ac-cording to the results, under the FE-ECAP technology, the uniformity of billets deformation should be improved in order to enhance the performance of the deformed billets.