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Title: In situ high-energy X-ray diffraction investigation of the micromechanical behavior of Fe-0.1C-10Mn-0/2Al steel at room and elevated temperatures

Journal Article · · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
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  1. Univ. of Science and Technology Beijing, Beijing (China). State Key Lab. for Advanced Metals and Materials
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS), X-ray Science Division
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The micromechanical behavior of medium-Mn transformation-induced-plasticity (TRIP) steels with nominal chemical compositions of Fe-0.1C-10Mn (mass%) (0Al steel) and Fe-0.1C-10Mn-2Al (mass%) (2Al steel) fabricated by intercritical annealing 600 degrees C for 1 h and 650 degrees C for 1 h, respectively, was investigated using in situ high-energy X-ray diffraction (HE-XRD) with uniaxial tensile tests at 25 degrees C and 100 degrees C. We found that Liiders band propagation promoted lower volume fraction of austenite transformation to martensite in 0Al steel than 2Al steel at 25 degrees C while higher volume fraction of austenite transformation to martensite in 0Al steel than 2Al steel at 100 degrees C. Portevin-Le Chatelier (PLC) band propagation promoted higher volume fraction of austenite transformation to martensite in 0Al steel than 2Al steel during deformation at 25 degrees C and 100 degrees C. Moreover, the addition of Al obviously suppresses the formation of intermediate epsilon martensite during tensile deformation, thus the zigzag change in lattice strain of austenite was completely depressed in 2Al steel. Due to the controlled stability of metastable austenite, the 2Al steel demonstrated the best combination of ultimate tensile strength and total elongation at 25 degrees C.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities; Chinese Academy of Sciences (CAS) - State Key Laboratory for Advanced Metals and Materials; USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1480850
Alternate ID(s):
OSTI ID: 1496336
Journal Information:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Vol. 729, Issue C; ISSN 0921-5093
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

Figures / Tables (12)

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Related Subjects

36 MATERIALS SCIENCE
austenite stability
high-energy x-ray diffraction
load partitioning
medium-Mn TRIP steel