Influence of strain rate and crystallographic orientation on dynamic recrystallization of pure Zn during room-temperature compression  

作　　者：Shiyang Liu Damon Kent Hongyi Zhan Nghiem Doan Chang Wang Sen Yu Matthew Dargusch Gui Wang 

机构地区：[1]Queensland Centre for Advanced Materials Processing and Manufacturing,School of Mechanical and Mining Engineering,The University of Queensland,Brisbane,QLD,4072,Australia [2]ARC Research Hub for Advanced Manufacturing of Medical Devices,The University of Queensland,Brisbane,QLD,4072,Australia [3]School of Science,Technology and Engineering,University of the Sunshine Coast,Maroochydore DC,QLD,4558,Australia [4]China Science Lab,General Motors Global Research&Development,56 Jinwan Road,Shanghai,201206,China [5]School of Dentistry and Oral Health,Griffith University,Gold Coast,QLD,4215,Australia [6]Northwest Institute for Nonferrous Metal Research,Shanxi Key Laboratory of Biomedical Metal Materials,96 Weiyang Road,Xi’an,710016,China

出　　处：《Journal of Materials Science & Technology》2021年第27期237-250,共14页材料科学技术（英文版）

基　　金：financial support from the Queensland Centre for Advanced Materials Processing and Manufacturing(AMPAM);the ARC Research Hub for Advanced Manufacturing of Medical Devices(IH150100024);financial support from the Key Research and Development Program of Shaanxi Province(2019ZDLSF03-06)。

摘　　要：This work investigates the strain rate dependence of dynamic recrystallization behaviour of high-purity zinc in room temperature compression under strain rates of 10^(-4)s^(-1),10-2s^(-1)and 0.5 s^(-1).Results from electron backscatter diffraction provide insight into the deformation and dynamic recrystallization mechanisms operative.Continuous dynamic recrystallization,twin-induced dynamic recrystallization,and discontinuous dynamic recrystallization are all active under compressive deformation at room temperature.Due to the high stacking fault energy of Zn,continuous dynamic recrystallization is the dominant mechanism while discontinuous dynamic recrystallization only operates in the early stages of compression at 10^(-4)s^(-1).Dynamic recrystallization kinetics are enhanced at higher strain rates(10^(-2)s^(-1)and 0.5s^(-1))due to an increased contribution from twin-induced dynamic recrystallization.The present study reveals that the controlling mechanisms for continuous dynamic recrystallization are basalslip and 2ndorder pyramidalslip activity.Because the activation of slip systems is mainly determined by crystallographic orientation,continuous dynamic recrystallization behaviour varies with grain orientation according to their propensity for basal and 2ndorder pyramidal slip.

关 键 词：ZINC Dynamic recrystallization Crystallographic orientation Schmid factor EBSD 

分 类 号：TG146.13[一般工业技术—材料科学与工程]