Strain partition and rupture analysis of notched tensile multilayered steel specimens

doi:10.1016/j.matchar.2018.09.027

Title: Strain partition and rupture analysis of notched tensile multilayered steel specimens

Abstract

Multilayered steel composites consisting of alternating martensitic and austenite layers were successfully fabricated with a combination of high strength and ductility. In situ SEM tensile experiments were performed to investigate the fracture processes. Results indicated that the martensitic layer distributed between two ductile austenite layers has better deformation ability, and the dimple fracture mode dominated the fracture of the whole specimen. In situ synchrotron microbeam X-ray diffraction experiments were carried out to study the microscopic deformation in austenitic layer and martensitic layer ahead of notch root under incremental tensile loading. Results indicated that for austenite layer, the maximum strain is located in the middle of the layer at the lower applied load. When at the higher applied load, larger strain is concentrated on the notch root. For martensitic layer, uniform strain is distributed at the region at the lower applied load, with increasing the applied load, small strain appears in the middle of martensitic layer. However, the variation in the strain in the martensitic layer is relatively smaller, which is actually affected by both the notch and the ferrite content in the martensitic layer. Furthermore, the changing trends of the strain in the austenite layer and martensitic layer can stillmore »« less

Authors:

Cao, R. ^[1]; Yu, X. ^[2];

^[2]; Liu, W. ^[3]; Xu, R. ^[3]; Ojima, M. ^[4]; Koseki, T. ^[4]

Lanzhou Univ. of Technology, Lanzhou (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Argonne National Lab. (ANL), Lemont, IL (United States)
Univ. of Tokyo, Tokyo (Japan)

Publication Date:: 2018-09-18

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC); National Natural Science Foundation of China (NNSFC)

OSTI Identifier:: 1508367

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Materials Characterization

Additional Journal Information:: Journal Volume: 145; Journal Issue: C; Journal ID: ISSN 1044-5803

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; austenite; in-situ SEM tensile; in-situ synchrotron; martensitic; multilayered steel composite

Citation Formats


                    Cao, R., Yu, X., Feng, Z., Liu, W., Xu, R., Ojima, M., and Koseki, T. Strain partition and rupture analysis of notched tensile multilayered steel specimens.  United States: N. p., 2018. 
        Web.  doi:10.1016/j.matchar.2018.09.027.

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                    Cao, R., Yu, X., Feng, Z., Liu, W., Xu, R., Ojima, M., & Koseki, T. Strain partition and rupture analysis of notched tensile multilayered steel specimens.  United States.  doi:10.1016/j.matchar.2018.09.027.

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                    Cao, R., Yu, X., Feng, Z., Liu, W., Xu, R., Ojima, M., and Koseki, T. Tue .  
        "Strain partition and rupture analysis of notched tensile multilayered steel specimens".  United States.  doi:10.1016/j.matchar.2018.09.027.  https://www.osti.gov/servlets/purl/1508367.

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@article{osti_1508367,

  title        = {Strain partition and rupture analysis of notched tensile multilayered steel specimens},

  author       = {Cao, R. and Yu, X. and Feng, Z. and Liu, W. and Xu, R. and Ojima, M. and Koseki, T.},

  abstractNote = {Multilayered steel composites consisting of alternating martensitic and austenite layers were successfully fabricated with a combination of high strength and ductility. In situ SEM tensile experiments were performed to investigate the fracture processes. Results indicated that the martensitic layer distributed between two ductile austenite layers has better deformation ability, and the dimple fracture mode dominated the fracture of the whole specimen. In situ synchrotron microbeam X-ray diffraction experiments were carried out to study the microscopic deformation in austenitic layer and martensitic layer ahead of notch root under incremental tensile loading. Results indicated that for austenite layer, the maximum strain is located in the middle of the layer at the lower applied load. When at the higher applied load, larger strain is concentrated on the notch root. For martensitic layer, uniform strain is distributed at the region at the lower applied load, with increasing the applied load, small strain appears in the middle of martensitic layer. However, the variation in the strain in the martensitic layer is relatively smaller, which is actually affected by both the notch and the ferrite content in the martensitic layer. Furthermore, the changing trends of the strain in the austenite layer and martensitic layer can still show the better combination of brittle martensitic phase and ductile austenite phase.},

  doi          = {10.1016/j.matchar.2018.09.027},

  journal      = {Materials Characterization},

  number       = C,

  volume       = 145,

  place        = {United States},

  year         = {2018},

  month        = {9}

}

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Journal Article:

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DOI: 10.1016/j.matchar.2018.09.027

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Figures / Tables:

Fig. 1: Relationships between fracture elongation and tensile strength of various materials.

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Figures / Tables found in this record:

Fig. 10: Part 1(p. 15)

Fig. 10: Part 2(p. 16)

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