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首页> 外文学位 >Analytical and Experimental Evaluation of the Effect of Hydraulic Bulge Process on the Formability and Surface Topography of Annealed AISI 304 Stainless Steel at Micro/Meso-Scale
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Analytical and Experimental Evaluation of the Effect of Hydraulic Bulge Process on the Formability and Surface Topography of Annealed AISI 304 Stainless Steel at Micro/Meso-Scale

机译：液压胀形工艺对退火的AISI 304不锈钢微观/中尺度成形性和表面形貌影响的分析和实验评估

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摘要

The demand for miniature devices has increased the application of hydroforming process in various micro-scale applications. This research ascertain the material properties of 0.2 mm thick AISI 304 stainless steel using hydraulic bulge test, and it also analyze the surface characteristics of the same material. The work pieces for this work consist of circular and elliptical work pieces. The circular work pieces were formed using dies of cavity diameters 5 mm and 11 mm, while the elliptical work pieces were formed using elliptical cavity dies with aspect ratio of 0.5, 0.8, and 0.67. Analytical methods proposed by Chakrabarty, Ekineev-Kruglov, Jovane, and Marciniak for the determination of the flow curve of sheet metal were compared to the experimental result. The outcome indicates that the Ekineev - Kruglov method has the best correlation with the experiment. An improved approach of the Banabic method was developed for the elliptical workpieces, and the results showed shows considerable improvement on the method. Surface characteristics of the 5 mm and 11 mm die work pieces were tested using the atomic force microscope; the outcome demonstrates that most of the surface parameters exhibit a linear relation with the strain. The roughness increase with increasing strain.
机译：对微型设备的需求增加了液压成型工艺在各种微型应用中的应用。这项研究通过液压凸起试验确定了0.2毫米厚的AISI 304不锈钢的材料性能，并分析了相同材料的表面特性。这项工作的工件包括圆形和椭圆形的工件。使用腔直径为5mm和11mm的模具形成圆形工件，而使用纵横比为0.5、0.8和0.67的椭圆形腔模具形成椭圆形工件。将Chakrabarty，Ekineev-Kruglov，Jovane和Marciniak提出的用于确定薄板流动曲线的分析方法与实验结果进行了比较。结果表明，Ekineev-Kruglov方法与实验的相关性最好。针对椭圆形工件开发了一种改进的Banabic方法，结果表明对该方法有很大的改进。使用原子力显微镜测试了5 mm和11 mm模具工件的表面特性；结果表明，大多数表面参数与应变呈线性关系。粗糙度随着应变的增加而增加。

著录项

  • 作者

    Olayinka, Ayotunde.;

  • 作者单位

    University of Louisiana at Lafayette.;

  • 授予单位 University of Louisiana at Lafayette.;
  • 学科 Mechanical engineering.
  • 学位 M.S.
  • 年度 2016
  • 页码 100 p.
  • 总页数 100
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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