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<title-group><doi>053</doi>
<article-title>Effect of Tribological Condition on Forming Minute Parts by Micro-Meso Extrusion of A6063 Alloy</article-title>
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<author>N. Takatsuji<sup>1,a</sup>, K. Dohda<sup>2,b</sup> and T. Funazuka<sup>3,c</sup>  </author>

<aff><sup>1</sup>Graduate School of Science and Engineering for Research, University of Toyama, Japan. </aff>

<email><a href="mailto:takatsuji@eng.u-toyama.ac.jp"><sup>a</sup>takatsuji@eng.u-toyama.ac.jp</a></email>

<aff><sup>2</sup>Department of Mechanical Engineering, Northwestern University, USA. </aff>

<email><a href="mailto:dohda.kuni@northwestern.edu "><sup>b</sup>dohda.kuni@northwestern.edu </a></email>

<aff><sup>3</sup>Graduate School of Science and Engineering for Education., University of Toyama, Japan. </aff>

<email><a href="mailto:m1371222@ems.u-toyama.ac.jp  "><sup>c</sup>m1371222@ems.u-toyama.ac.jp  </a></email>



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<title>ABSTRACT</title>
<p>The recent trend towards miniaturization of products and technology has boosted a strong demand for such metallic micro-parts with micro features and high tolerances. Conventional forming technologies, such as extrusion and drawing, have encountered new challenges at the micro-scale level due to the &#8216;size effects&#8217; that tends to be predominant at this scale level. Friction is one of the predominant factors exercising strong effects in micro-forming. Previous studies varied grain size of the test pieces in order to examine size effects in micro-extrusion. In addition, the effects on the extrusion load, forming shape, as well as hardness of different grain sizes, die coatings and lubricants were compared. DLC coating has been proven effective as a die coating. Increasing grain size was effective with lubricants having high viscosity. In this study, the effect of different die angles and lubricants is compared and examined.  </p><p><italic>Keywords: </italic>Micro-extrusion, Tribology, Die angle, Lubricants. </p>
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