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5083铝合金壳体超塑胀形加载曲线优化控制 曹洋1,童国权2,徐雪峰2,朱世凤1,赵祖德1,黄少东1 (1.中国兵器工业第五九研究所,重庆,400039;2.南京航空航天大学,机电学院,南京,210016) 摘要:为了改善超塑成形零件的壁厚均匀性问题,优化了有限元软件MARC的加载算法.在每一步长中选取20个应变速率最大的单元,求平均值,并与最佳应变速率对比,获得优化加载曲线.基于有限元分析,选择5083铝合金壳体进行了超塑成形实验.研究结果表明:优化的加载算法使应变速率始终保持在最佳应变速率附近,提高了零件变形严重区域的厚度;避免了在加载过程中由于壁厚不均匀使得裂纹产生,验证了模拟结果的准确性.与MARC默认的加载算法相比,采用优化加载算法能改善零件的壁厚均匀性. 关键词:超塑成形; 加载算法; 加载曲线; 有限元模拟; [全文内容正在添加中] ......
Trans. Nonferrous Met. Soc. China 20(2010) s744-s748 Microstructure of semi-solid ADC12 aluminum alloy adopting new SIMA method WANG Zhen-yu(王振宇), JI Ze-sheng(吉泽升), SUN Li-xin(孙丽鑫... microstructure of ADC12 aluminum alloy containing spherical solid particles was studied. A new strain-induced melt activation (SIMA) process was proposed. In the treatment, chips were cut from ADC12......
Constituents evolution of LFEC 7050 aluminum alloy during processing ZUO Yu-bo(左玉波)1, WANG Shuang(王爽)2, ZHAO Zhi-hao(赵志浩)1, CUI Jian-zhong(崔建忠)1, ZHANG Hai-tao(张海涛)1, TU Gan-feng(涂赣峰)3 1. Key...: The d 120 mm ingots of 7050 aluminum alloy were made by low frequency electromagnetic casting (LFEC) and conventional DC casting process, respectively. After homogenization treatment the ingots were......
Residual strains of aluminum alloy characterized by nanoindentation WANG Yan-shen(王延深)1, 2, QU Shi-liang(曲士良)3, GAI Yu-xian(盖玉先)2, DONG Shen(董 申)4, LIANG Ying-chun(梁迎春)4 1. Department of Physics...: A formula was brought forward to correlate residual strain with hardness measured by nanoindentation method. Using the formula, residual strains in prestrained aluminum alloy samples were evaluated......
Preparation and Characterization of Amorphous Layer on Aluminum Alloy Formed by Plasma Electrolytic Deposition (PED) XIA Yuan1,GUAN Yong-jun1 (1.Institute of Mechanics, CAS, Beijing, China) 摘要... into xSiO2(1-x)Al2O3 and then transformed into amorphous [Al-Si-O] phase. 关键词:plasma electrolytic deposition; amorphous layer; aluminum alloy; [全文内容正在添加中] ......
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Effects of process parameters on numerical control bending process for large diameter thin-walled aluminum alloy tubes LI Cheng(李 成)1, YANG He(杨 合)1, ZHAN Mei(詹 梅)1, XU Xu-dong(许旭东)2... aluminum alloy tubes with outer diameter of 70 mm, wall thickness of 1.5 mm, and centerline bending radius of 105 mm. And the effects of process parameters on tube wall thinning and cross section......
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Effect of evolution of polycrystalline textures onr-value of LF2 aluminum alloy ZHAO Yi-xi(赵亦希), LIN Zhong-qin(林忠钦), LI Shu-hui(李淑慧), YU Zhong-qi(于忠奇) School of Mechanical Engineering, Shanghai... of aluminum alloy sheet was investigated. For this purpose, the textures under different elongation of LF2 aluminum alloy were measured and analyzed. The result indicates that the initial texture of LF2......
