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Title: An integrated two-dimensional modeling method for predicting ductility of thin-walled die cast magnesium

Abstract

In this paper, a two-dimensional (2D) microstructure-based modeling method is developed in order to predict the ductility of a thin-walled high pressure die cast magnesium (Mg) by considering the three-dimensional (3D) thru-thickness pore distributions. For this purpose, a series of 3D synthetic microstructure-based finite element models and the corresponding 2D models are first generated with various pore volume fractions, pore size distributions and pore shapes. The input material properties for the 2D models are determined based on the 3D cubic model with a spherical pore and the generalized Neuber’s rule. Based on the resulting ductility of the 3D and 2D models, a 3D/2D ductility correlation curve is developed as a function of the characteristics/shape of the input fracture strain curve used in the 3D model. The validity of the ductility correlation curve is examined with casting samples with actual microstructures. Here, the results show that the suggested 2D modeling methodology can be used together with the ductility correlation curve in predicting the ductility of thin-walled Mg castings.

Authors:
 [1];  [1]; ORCiD logo [2];  [3];  [4];  [5];  [5]
+ Show Author Affiliations
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Purdue Univ., West Lafayette, IN (United States)
  4. Tsinghua Univ., Beijing (People’s Republic of China)
  5. Ford Motor Co., Dearborn, MI (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1570892
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Fracture
Additional Journal Information:
Journal Issue: 1; Journal ID: ISSN 0376-9429
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Mg castings; Ductility; Microstructure; Porosity; Finite element analysis (FEA); Fracture strain

Citation Formats

Choi, Kyoo Sil, Barker, Erin I., Sun, Xin, Song, Jie, Xiong, Shou-Mei, Forsmark, Joy, and Li, Mei. An integrated two-dimensional modeling method for predicting ductility of thin-walled die cast magnesium. United States: N. p., 2019. Web. doi:10.1007/s10704-019-00390-w.
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Choi, Kyoo Sil, Barker, Erin I., Sun, Xin, Song, Jie, Xiong, Shou-Mei, Forsmark, Joy, & Li, Mei. An integrated two-dimensional modeling method for predicting ductility of thin-walled die cast magnesium. United States. doi:10.1007/s10704-019-00390-w.
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Choi, Kyoo Sil, Barker, Erin I., Sun, Xin, Song, Jie, Xiong, Shou-Mei, Forsmark, Joy, and Li, Mei. Thu . "An integrated two-dimensional modeling method for predicting ductility of thin-walled die cast magnesium". United States. doi:10.1007/s10704-019-00390-w. https://www.osti.gov/servlets/purl/1570892.
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@article{osti_1570892,
title = {An integrated two-dimensional modeling method for predicting ductility of thin-walled die cast magnesium},
author = {Choi, Kyoo Sil and Barker, Erin I. and Sun, Xin and Song, Jie and Xiong, Shou-Mei and Forsmark, Joy and Li, Mei},
abstractNote = {In this paper, a two-dimensional (2D) microstructure-based modeling method is developed in order to predict the ductility of a thin-walled high pressure die cast magnesium (Mg) by considering the three-dimensional (3D) thru-thickness pore distributions. For this purpose, a series of 3D synthetic microstructure-based finite element models and the corresponding 2D models are first generated with various pore volume fractions, pore size distributions and pore shapes. The input material properties for the 2D models are determined based on the 3D cubic model with a spherical pore and the generalized Neuber’s rule. Based on the resulting ductility of the 3D and 2D models, a 3D/2D ductility correlation curve is developed as a function of the characteristics/shape of the input fracture strain curve used in the 3D model. The validity of the ductility correlation curve is examined with casting samples with actual microstructures. Here, the results show that the suggested 2D modeling methodology can be used together with the ductility correlation curve in predicting the ductility of thin-walled Mg castings.},
doi = {10.1007/s10704-019-00390-w},
journal = {International Journal of Fracture},
number = 1,
volume = ,
place = {United States},
year = {2019},
month = {10}
}
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DOI:  10.1007/s10704-019-00390-w
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