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Title: Lüders-like martensitic transformation in a Cu/carbon-steel nanocomposite: An in situ synchrotron study

Journal Article · · Journal of Alloys and Compounds
 [1];  [1];  [1];  [1];  [1];  [2];  [3]
  1. China Univ. of Petroleum, Beijing (China). Dept. of Materials Science and Engineering
  2. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
  3. China Univ. of Petroleum, Beijing (China). Dept. of Materials Science and Engineering. Beijing Key Lab. of Failure, Corrosion, and Protection of Oil/Gas Facilities
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In this paper, a Cu/carbon-steel nanocomposite is fabricated by pressing, rolling and wire drawing. The average layer thickness is about 69 nm for steel and 67 nm for Cu. Cu suppresses the growth of prior austenite at elevated temperature, and thus the steel layer thickness barely increases during austenization. Subsequent quenching results in a large amount of metastable retained austenite within the steel layers. The martensitic transformation behavior of the composite during plastic deformation is investigated by in situ tensile test using synchrotron X-ray diffraction at room temperature. It is found that the retained austenite, rather than Cu, dominates the plastic deformation of the nanocomposite. Finally, in situ results verify that the transformation of retained austenite initiates in a manner of Lüders-like band due to stress-induced martensitic transformation, followed by strain-induced martensitic transformation until fracture.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC02-06CH11357; 51501225; 1731010; 11474362
OSTI ID:
1471527
Journal Information:
Journal of Alloys and Compounds, Vol. 741; ISSN 0925-8388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

Figures / Tables (6)

Figure 1(p. 14)figure Figure 1
Figure 2(p. 15)figure Figure 2
Figure 3(p. 16)figure Figure 3
Figure 4(p. 17)figure Figure 4
Figure 5(p. 18)figure Figure 5
Figure 6(p. 19)figure Figure 6

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Related Subjects

36 MATERIALS SCIENCE
In situ synchrotron X-ray diffraction
Luders-like
Martensitic transformation
Retained austenite