Manufacturing and characterization of Ni-free N-containing ODS austenitic alloy

JOURNAL OF NUCLEAR MATERIALS

卷:501

Article

Mori, A.^1,2  Mamiya, H.¹  Ohnuma, M.³  Ilavsky, J.⁴  Ohishi, K.⁵  Wozniak, Jaroslaw²  Olszyna, A.²  Watanabe, N.¹  Suzuki, J.⁵  Kitazawa, H.¹  Lewandowska, M.² 

[1] NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

[2] WUT, Fac Mat Sci & Engn, Woloska 141, PL-02507 Warsaw, Poland

[3] Hokkaido Univ, Fac Engn, Kita Ku, Kita 13,Nishi 8, Sapporo, Hokkaido 0608628, Japan

[4] Argonne Natl Lab, Adv Photon Source, Xray Sci Div, 9700 S Cass Ave,Bldg 433A002, Argonne, IL 60439 USA

[5] CROSS, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan

关键词: ODS austenitic steel;    Mechanical alloying;    Spark plasma sintering (SPS);    Nanoparticle;    Small-angle neutron scattering (SANS);    Contrast variation analysis (ACV);   

DOI  :  10.1016/j.jnucmat.2018.01.025

来源: Elsevier

【 摘 要 】

Ni-free N-containing oxide dispersion strengthened (ODS) austenitic alloys were manufactured by mechanical alloying (MA) followed by spark plasma sintering (SPS). The phase evolutions during milling under a nitrogen atmosphere and after sintering were studied by X-ray diffraction (XRD). Transmission electron microcopy (TEM) and alloy contrast variation analysis (ACV), including small-angle neutron scattering (SANS) and ultra-small-angle X-ray scattering (USAXS), revealed the existence of nanoparticles with a diameter of 3-51 nm for the samples sintered at 950 degrees C. Sintering at 1000 degrees C for 5 and 15 min caused slight growth and a significant coarsening of the nanoparticles, up to 70 nm and 128 nm, respectively. The ACV analysis indicated the existence of two populations of Y2O3, epsilon-martensite and MnO. The dispersive X-ray spectrometry (EDS) confirmed two kinds of nanoparticles, Y2O3 and MnO. The material was characterized by superior micro-hardness, of above 500 HV0.1. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

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