Constitutive Equation and Hot Processing Map of Mg-16Al Magnesium Alloy Bars

Ma, Zongwen; Hu, Fengya; Wang, Zhongjun; Fu, Kuijun; Wei, Zhenxiong; Wang, Jiaji; Li, Weijuan

doi:10.3390/ma13143107

Cited by 19 publications

(9 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The advantageous properties could be attained only if the reinforcements are distributed homogeneously and not clustered in the matrix. According to the literature available [ 153 , 154 , 155 , 156 , 157 , 158 , 159 , 160 , 161 , 162 , 163 , 164 , 165 , 166 , 167 , 168 , 169 , 170 , 171 , 172 , 173 , 174 , 175 , 176 , 177 , 178 , 179 , 180 , 181 , 182 , 183 , 184 , 185 , 186 , 187 ], limited research has been performed on CNT-reinforced MMCs due to difficulties in fabricating and dispersion of CNTs in the matrix. Most studies investigated the fabrication methods such as the casting process and powder metallurgy for developing Mg-based alloy [ 188 , 189 , 190 , 191 , 192 , 193 , 194 , 195 , 196 , 197 , 198 , 199 , 200 , 201 ,…”

Section: Summary and Future Road Mapsmentioning

confidence: 99%

Carbon Nanotubes (CNTs)-Reinforced Magnesium-Based Matrix Composites: A Comprehensive Review

et al. 2020

View full text Add to dashboard Cite

In recent years considerable attention has been attracted to magnesium because of its light weight, high specific strength, and ease of recycling. Because of the growing demand for lightweight materials in aerospace, medical and automotive industries, magnesium-based metal matrix nanocomposites (MMNCs) reinforced with ceramic nanometer-sized particles, graphene nanoplatelets (GNPs) or carbon nanotubes (CNTs) were developed. CNTs have excellent material characteristics like low density, high tensile strength, high ratio of surface-to-volume, and high thermal conductivity that makes them attractive to use as reinforcements to fabricate high-performance, and high-strength metal-matrix composites (MMCs). Reinforcing magnesium (Mg) using small amounts of CNTs can improve the mechanical and physical properties in the fabricated lightweight and high-performance nanocomposite. Nevertheless, the incorporation of CNTs into a Mg-based matrix faces some challenges, and a uniform distribution is dependent on the parameters of the fabricating process. The characteristics of a CNTs reinforced composite are related to the uniform distribution, weight percent, and length of the CNTs, as well as the interfacial bonding and alignment between CNTs reinforcement and the Mg-based matrix. In this review article, the recent findings in the fabricating methods, characterization of the composite’s properties, and application of Mg-based composites reinforced with CNTs are studied. These include the strategies of fabricating CNT-reinforced Mg-based composites, mechanical responses, and corrosion behaviors. The present review aims to investigate and conclude the most relevant studies conducted in the field of Mg/CNTs composites. Strategies to conquer complicated challenges are suggested and potential fields of Mg/CNTs composites as upcoming structural material regarding functional requirements in aerospace, medical and automotive industries are particularly presented.

show abstract

Section: Summary and Future Road Mapsmentioning

confidence: 99%

Carbon Nanotubes (CNTs)-Reinforced Magnesium-Based Matrix Composites: A Comprehensive Review

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Figure 23 shows the AARE-values and RMSE-values obtained based on the experimental and predicted stress under different deformation temperatures. In addition, the average root mean square error (RMSE) is a statistical measures, which is used to evaluate the performance of the four constitutive equation further [15,52]. The expression of RMSE is as follows:…”

Section: Rementioning

confidence: 99%

“…In the present study, the warm and hot deformation behavior of 20Cr2Ni4A alloy steel is described based on the compression tests in temperatures ranging from 973. 15 is the highest because the msA-type equation has the highest R-value (0.981), the lowest AARE-value (4.70%) and MRSE-value (0.6 MPa). Moreover, the R-value, AARE-value and RMSE-value of the modified Hensel-Spittel (mHS) equation are 0.978, 4.98% and 0.65 MPa, respectively.…”

Section: Constitutivementioning

confidence: 99%

“…A comparative study of Xia et al [14] suggested the strain-compensated Arrhenius-type equation has a stronger prediction ability than the Johnson-Cook equation and the physically based constitutive equation. To predict the hot flow stress of 10% Cr steel alloy, Abdallah et al [15] found the prediction accuracy of the strain-compensated Arrhenius-type model is higher than that of modified Johnson-Cook. Moreover, the previous comparative studies have found the strain-compensated Arrhenius-type equation can give a more accurate description of the relationship between flow stress and deformation conditions when compared with the modified Johnson-Cook, Johnson-Cook equations [16,17].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Constitutive Equations for Describing the Warm and Hot Deformation Behavior of 20Cr2Ni4A Alloy Steel

Wang

Zhai

et al. 2020

Metals

View full text Add to dashboard Cite

Isothermal hot compression tests of 20Cr2Ni4A alloy steel were performed under temperatures of 973–1273 K and strain rates of 0.001–1 s−1. The behavior of the flow stress of 20Cr2Ni4A alloy steel at warm and hot temperatures is complicated because of the influence of the work hardening, the dynamic recovery, and the dynamic recrystallization. Four constitutive equations were used to predict the flow stress of 20Cr2Ni4A alloy steel, including the original strain-compensated Arrhenius-type (osA-type) equation, the new modified strain-compensated Arrhenius-type (msA-type) equation, the original Hensel–Spittel (oHS) equation and the modified Hensel–Spittel (mHS) equation. The msA-type and mHS are developed by revising the deformation temperatures, which can improve prediction accuracy. In addition, we propose a new method of solving the parameters by combining a linear search with multiple linear regression. The new solving method is used to establish the two modified constitutive equations instead of the traditional regression analysis. A comparison of the predicted values based on the four constitutive equations was performed via relative error, average absolute relative error (AARE) and the coefficient of determination (R2). These results show the msA-type and mHS equations are more accurate and efficient in terms of predicting the flow stress of the 20Cr2Ni4A steel at elevated temperature.

show abstract

“…A similar result was obtained by developing constitutive models of 21–4 N heat resistant steel [ 9 ]. Moreover, the strain-compensated Arrhenius-type equation is most widely applied to describe the high-temperature flow behavior of metals and alloys [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. These results mean that the strain-compensated Arrhenius-type model has a relatively strong predictive ability.…”

Section: Introductionmentioning

confidence: 99%

Constitutive Equations for Describing the Hot Compressed Behavior of TC4–DT Titanium Alloy

Wang

et al. 2020

Materials

View full text Add to dashboard Cite

Isothermal hot compression tests of TC4–DT titanium alloy were performed under temperatures of 1203–1293 K and strain rates of 0.001–10 s−1. The purpose of this study is to develop a new high-precision modified constitutive model that can describe the deformation behavior of TC4–DT titanium alloy. Both the modified strain-compensated Arrhenius-type equation and the modified Hensel–Spittel equation were established by revising the strain rate. The parameters in the above two modified constitutive equation were solved by combining regression analysis with iterative methods, which was used instead on the traditional linear regression methods. In addition, both the original strain-compensated Arrhenius-type equation and Hensel–Spittel equation were established to compare with the new modified constitutive equations. A comparison of the predicted values based on the four constitutive equations was performed via relative error, average absolute relative error (AARE) and the correlation coefficient (R). These results show the modified Arrhenius-type equation and the modified Hensel–Spittel equation is more accurate and efficient with a similar prediction accuracy. The AARE-value of the two modified constitutive equation is relatively low under various strain rates and their fluctuation is small as the strain rate changes.

show abstract

Constitutive Equation and Hot Processing Map of Mg-16Al Magnesium Alloy Bars

Cited by 19 publications

References 41 publications

Carbon Nanotubes (CNTs)-Reinforced Magnesium-Based Matrix Composites: A Comprehensive Review

Carbon Nanotubes (CNTs)-Reinforced Magnesium-Based Matrix Composites: A Comprehensive Review

Constitutive Equations for Describing the Warm and Hot Deformation Behavior of 20Cr2Ni4A Alloy Steel

Constitutive Equations for Describing the Hot Compressed Behavior of TC4–DT Titanium Alloy

Contact Info

Product

Resources

About