超声振动辅助SUS304薄带塑性变形的Johnson-Cook本构模型  

Johnson-Cook constitutive model of plastic deformation of SUS304 thin strip assisted by ultrasonic vibration

作　　者：李宁 廖席 段浩杰 李赫 刘文文 赵利平 任忠凯 LI Ning;LIAO Xi;DUAN Hao-jie;LI He;LIU Wen-wen;ZHAO Li-ping;REN Zhong-kai(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Tisco Stainless Steel Precision Strip Co.,Ltd.,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]山西太钢不锈钢精密带钢有限公司,山西太原030024

出　　处：《塑性工程学报》2023年第3期162-168,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(52275361,51974196);山西省科技重大专项(20181102015);山西省重点研发计划(201903D421047)。

摘　　要：通过超声能场辅助SUS304薄带拉伸试验发现,薄带塑性变形过程中的流动应力明显下降,体现了超声的软化效应。硬化指数和硬化系数随着超声能量的增加呈指数增加,且伸长率也发生了明显的下降,说明超声能场的加入对材料产生了硬化作用。相较于常规拉伸,施加超声能场后薄带的应变速率也发生了明显的提升,说明超声提高了薄带的应变速率敏感性。基于Johnson-Cook本构模型,建立了超声能场作用下SUS304薄带塑性变形的本构模型,用于定量分析超声能场振幅对SUS304薄带塑性变形的影响。Through the ultrasonic energy field-assisted tensile test of SUS304 thin strip,it is found that the flow stress during the plastic deformation process of the thin strip decreases obviously,which reflects the softening effect of ultrasound.The hardening index and hardening coefficient increase exponentially with the increase of ultrasonic energy,and the elongation also decreases significantly,indicating that the addition of ultrasonic energy field has a hardening effect on the material.Compared with the conventional tension,the strain rate of the thin strip is also significantly increased after the application of ultrasonic energy field,indicating that ultrasonic enhanced the sensitivity of the strain rate of the thin strip.Based on the Johnson-Cook constitutive model,the constitutive model of the plastic deformation of SUS304 thin strip under the action of ultrasonic energy field was established,which was used to quantitatively analyze the influence of ultrasonic energy field amplitude on the plastic deformation of SUS304 thin strip.

关 键 词：Johnson-Cook本构模型 超声能场 304不锈钢薄带 软化效应 

分 类 号：TG155.21[金属学及工艺—热处理]