Joun Man-Soo, Razali Mohd Kaswandee, Jee Chang-Woon, Byun Jong-Bok, Kim Min-Cheol, Kim Kwang-Min
Engineering Research Institute (ERI), School of Mechanical and Aerospace Engineering, Gyeongsang National University, Jinju 52828, Korea.
Technical Research Laboratories, POSCO, Gwangyang 57807, Korea.
Materials (Basel). 2022 Apr 8;15(8):2751. doi: 10.3390/ma15082751.
We focus on the importance of accurately describing the flow behaviors of metallic materials to be cold formed; we refer to several valuable examples. We review the typical experimental methods by which flow curves are obtained, in addition to several combined experimental-numerical methods. The characteristics of four fundamental flow models including the Ludwik, Voce, Hollomon, and Swift models are explored in detail. We classify all flow models in the literature into three groups, including the Ludwik and Voce families, and blends thereof. We review the experimental and numerical methods used to optimize the flow curves. Representative flow models are compared via tensile testing, with a focus on the necking point and pre- or post-necking strain hardening. Several closed-form function models employed for the non-isothermal analyses of cold metal forming are also examined. The traditional bilinear model and derivatives thereof are used to describe the complicated flow behaviors of metallic materials at cold forming temperatures, particularly in terms of their applications to metal forming simulations and process optimization.
我们着重于准确描述待冷成型金属材料流动行为的重要性，并列举了几个有价值的例子。除了几种实验与数值相结合的方法外，我们还回顾了获取流动曲线的典型实验方法。详细探讨了包括Ludwik模型、Voce模型、Hollomon模型和Swift模型在内的四种基本流动模型的特点。我们将文献中的所有流动模型分为三组，包括Ludwik族和Voce族及其混合模型。我们回顾了用于优化流动曲线的实验和数值方法。通过拉伸试验比较了代表性的流动模型，重点关注颈缩点以及颈缩前或颈缩后的应变硬化。还研究了用于冷金属成型非等温分析的几种封闭形式函数模型。传统的双线性模型及其衍生模型被用于描述金属材料在冷成型温度下的复杂流动行为，特别是在其在金属成型模拟和工艺优化中的应用方面。
