Constitutive Modeling of Annealed OFHC with Wide Strain-Rate and Temperature Effects: Incorporating Dislocation Dynamics and Normalized Microstructural Size Evolution

doi:10.3390/ma16196517

	Constitutive Modeling of Annealed OFHC with Wide Strain-Rate and Temperature Effects: Incorporating Dislocation Dynamics and Normalized Microstructural Size Evolution
	Xu, Mengwen 1; Xiao, Qiangqiang 1; Zu, Xudong 1; Tan, Yaping 2; Huang, Zhengxiang 1
	2023-10
发表期刊	MATERIALS
卷号	16 期号:19
摘要	The flow stress of face-centered cubic (FCC) metals exhibits a rapid increase near a strain rate of 104 s-1 under fixed-strain conditions. However, many existing constitutive models either fail to capture the mechanical characteristics of this plastic deformation or use piecewise strain-rate hardening models to describe this phenomenon. Unfortunately, these piecewise models may suffer from issues such as discontinuity of physical quantities and difficulties in determining segment markers, and struggle to reflect the underlying physical mechanisms that give rise to this mutation phenomenon. In light of this, this paper proposes that the abrupt change in flow stress sensitivity to strain rate in FCC metals can be attributed to microstructural evolution characteristics. To address this, a continuous semiempirical physical constitutive model for FCC metals is established based on the microstructural size evolution proposed by Molinari and Ravichandran and the dislocation motion slip mechanism. This model effectively describes the mutation behavior of strain-rate sensitivity under fixed strain, particularly evident in an annealed OFHC. The predicted results of the model across a wide range of strain rates (10-4-106 s-1) and temperatures (77-1096 K) demonstrate relative errors generally within +/- 10% of the experimental values. Furthermore, the model is compared with five other models, including the mechanical threshold stress (MTS), Nemat-Nasser-Li (NNL), Preston-Tonks-Wallace (PTW), Johnson-Cook (JC), and Molinari-Ravichandran (MR) models. A comprehensive illustration of errors reveals that the proposed model outperforms the other five models in describing the plastic deformation behavior of OFHC. The error results offer valuable insights for selecting appropriate models for engineering applications and provide significant contributions to the field.
关键词	constitutive modelling RATE DEFORMATION microstructural sensitive FCC METALS OFHC copper RATE BEHAVIOR high strain rate COPPER PLASTICITY DENSITY STRESS SHEAR PRESSURE STRENGTH
DOI	10.3390/ma16196517
收录类别	SCIE
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001097397600001
出版者	MDPI
原始文献类型	Article
EISSN	1996-1944
引用统计	被引频次[WOS]：0 [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.library.ouchn.edu.cn/handle/39V7QQFX/168698
专题	国家开放大学江苏分部
通讯作者	Huang, Zhengxiang
作者单位	1.Nanjing Univ Sci & Technol, Sch Mech Engn, Nanjing 210094, Peoples R China; 2.Jiangsu Open Univ, Sch Informat Technol, Nanjing 210094, Peoples R China
推荐引用方式 GB/T 7714	Xu, Mengwen,Xiao, Qiangqiang,Zu, Xudong,et al. Constitutive Modeling of Annealed OFHC with Wide Strain-Rate and Temperature Effects: Incorporating Dislocation Dynamics and Normalized Microstructural Size Evolution[J]. MATERIALS,2023,16(19).
APA	Xu, Mengwen,Xiao, Qiangqiang,Zu, Xudong,Tan, Yaping,&Huang, Zhengxiang.(2023).Constitutive Modeling of Annealed OFHC with Wide Strain-Rate and Temperature Effects: Incorporating Dislocation Dynamics and Normalized Microstructural Size Evolution.MATERIALS,16(19).
MLA	Xu, Mengwen,et al."Constitutive Modeling of Annealed OFHC with Wide Strain-Rate and Temperature Effects: Incorporating Dislocation Dynamics and Normalized Microstructural Size Evolution".MATERIALS 16.19(2023).