In situ neutron diffraction study of α–γ Fe–Cr–Ni alloys under tensile deformation

• Published in: Acta materialia Vol. 49; no. 13; pp. 2471 - 2479
• Main Authors: Harjo, S., Tomota, Y., Lukáš, P., Neov, D., Vrána, M., Mikula, P., Ono, M.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.08.2001; Elsevier Science
• Subjects: Applied sciences; Cross-disciplinary physics: materials science; rheology; Deformation, plasticity, and creep; Exact sciences and technology; Fe–Cr–Ni alloys; In situ neutron diffraction; Materials science; Metals. Metallurgy; Physics; Treatment of materials and its effects on microstructure and properties; Fe–Cr–Ni alloys; In situ neutron diffraction; Tensile stress; Nickel alloys; Neutron diffraction; Ternary alloys; Plastic deformation; Chromium alloys; Experimental study; Iron base alloys
• ISSN: 1359-6454; 1873-2453
• DOI: 10.1016/S1359-6454(01)00147-1

Neutron diffraction experiments were performed in situ upon tensile loading for five Fe–Cr–Ni alloys with different ferrite volume fractions ranging from 0 to 100%. The diffraction profiles were recorded along with the tensile deformation curves during temporary stops in a deformation machine (5 ks each) with the crosshead fixed. One reflection of each phase, (111) of austenite (γ) and (110) of ferrite (α), respectively, were measured simultaneously by using a position sensitive detector. Evolution of elastic lattice strains and dislocation densities in both constituent phases was evaluated from measured diffraction profiles as a function of external loading. Based on these experimental results, heterogeneous deformation behavior in the α–γ dual-phase alloys is discussed.