Phase Stress Partition in Gray Cast Iron Using In Situ Neutron Diffraction Measurements

Tu Ngoc Lam, Szu Chien Wu, Hobyung Chae, Shi Wei Chen, Jayant Jain, Soo Yeol Lee, Ke An, Sven C. Vogel, Sung Mao Chiu, Dunji Yu, E. Wen Huang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Gray cast iron comprises α-Fe, Fe3C and graphite with their different anisotropies in terms of structure and mechanical behavior. We perform two different deformation paths as tension-compression and compression-tension on bulk gray iron to capture the stress partitioning. Using in situ neutron diffraction, the composite-like deformation behaviors of α-Fe and Fe3C are revealed simultaneously. Within the elastic deformation stage, both deformation paths do not cause load transfer. However, when the applied compressive stress exceeds 300 MPa, there is a clear load sharing in both paths. From microscopic examinations, the debonding between matrix and graphite is clarified.

Original languageEnglish
Pages (from-to)5029-5035
Number of pages7
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume51
Issue number10
DOIs
StatePublished - Oct 1 2020
Externally publishedYes

Funding

The Lujan Neutron Scattering Center at the Los Alamos Neutron Science Center is funded by the Department of Energy’s Office of Basic Energy Science. The Los Alamos National Laboratory is operated by the Los Alamos National Security LLC under the DOE Contract of DE-AC52-06NA25396 and DE-AC05-00OR22725. Research conducted at ORNL’s Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy. The authors appreciate the support of “Center for the Semiconductor Technology Research” from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan and the Ministry of Science and Technology (MOST) Programs 108-2221-E-009-131-MY4, 108-2218-E-007-056, and 109-2634-F-009-029. This work was financially supported by the “High Entropy Materials Center” from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan. EWH and his group members very much appreciate the financial support from the National Synchrotron Radiation Research Center (NSRRC) Neutron Program (MOST-108-2739-M-213-001). SYL was supported by the National Research Foundation (NRF) grant funded by the Korean Government (2020M2A2A6A05026873, 2020K1A3A7A09078090, 2017M2A2A6A05017653). The Lujan Neutron Scattering Center at the Los Alamos Neutron Science Center is funded by the Department of Energy’s Office of Basic Energy Science. The Los Alamos National Laboratory is operated by the Los Alamos National Security LLC under the DOE Contract of DE-AC52-06NA25396 and DE-AC05-00OR22725. Research conducted at ORNL’s Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy. The authors appreciate the support of “Center for the Semiconductor Technology Research” from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan and the Ministry of Science and Technology (MOST) Programs 108-2221-E-009-131-MY4, 108-2218-E-007-056, and 109-2634-F-009-029. This work was financially supported by the “High Entropy Materials Center” from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan. EWH and his group members very much appreciate the financial support from the National Synchrotron Radiation Research Center (NSRRC) Neutron Program (MOST-108-2739-M-213-001). SYL was supported by the National Research Foundation (NRF) grant funded by the Korean Government (2020M2A2A6A05026873, 2020K1A3A7A09078090, 2017M2A2A6A05017653).

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