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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 as well as the corresponding 2D models are first generated with various pore volume fractions, pore size distributions and pore shapes. The input 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 possible 3D/2D ductility correlation curve is obtained as function of the characteristics of the input fracture strain curve for the 3D model. The validity of the obtained ductility correlation curve is examined with actual sample microstructures measured by scanning acoustic microscopy. The results show that the suggested 2D modeling methodology can be used together with the ductility correlation curve in predicting the ductility of 3D models of thin-walled Mg castings. The suggested methodology may provide a basis for establishing possible 3D/2D fracture strain correlation curve for other loading conditions.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [5]
  1. BATTELLE (PACIFIC NW LAB)
  2. Purdue University
  3. Tsinghua University
  4. Ford
  5. Ford motor company
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1572889
Report Number(s):
PNNL-SA-105712
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
International Journal of Fracture
Additional Journal Information:
Journal Volume: 219; Journal Issue: 2
Country of Publication:
United States
Language:
English
Subject:
Mg castings, Ductility, Microstructure, Porosity, Finite element analysis, Correlation

Citation Formats

Choi, Kyoo Sil, Barker, Erin I., Sun, Xin, Song, Jie, Xiong, Shoi-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.
Choi, Kyoo Sil, Barker, Erin I., Sun, Xin, Song, Jie, Xiong, Shoi-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.
Choi, Kyoo Sil, Barker, Erin I., Sun, Xin, Song, Jie, Xiong, Shoi-Mei, Forsmark, Joy, and Li, Mei. Tue . "An integrated two-dimensional modeling method for predicting ductility of thin-walled die cast magnesium". United States. doi:10.1007/s10704-019-00390-w.
@article{osti_1572889,
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, Shoi-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 as well as the corresponding 2D models are first generated with various pore volume fractions, pore size distributions and pore shapes. The input 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 possible 3D/2D ductility correlation curve is obtained as function of the characteristics of the input fracture strain curve for the 3D model. The validity of the obtained ductility correlation curve is examined with actual sample microstructures measured by scanning acoustic microscopy. The results show that the suggested 2D modeling methodology can be used together with the ductility correlation curve in predicting the ductility of 3D models of thin-walled Mg castings. The suggested methodology may provide a basis for establishing possible 3D/2D fracture strain correlation curve for other loading conditions.},
doi = {10.1007/s10704-019-00390-w},
journal = {International Journal of Fracture},
number = 2,
volume = 219,
place = {United States},
year = {2019},
month = {10}
}