Studies on alloying process of a ferritic/martensitic oxide dispersion strengthened (ODS) steel prepared by mechanical alloying of elemental powders. (19th October 2016)

• Record Type: Journal Article
• Authors: Rajulapati, S. K.; Prakash, U.; Laha, K.; Dabhade, V. V.
• Is Part Of: Powder metallurgy. Volume 59:Number 5(2016)
• Page Start: 350
• Page End: 358
• Publication Date: 2016-10-19
• Subjects: ODS Steels -- High temperature materials -- Fast breeder nuclear reactor -- Powder metallurgy -- Mechanical alloying -- Simoloyer attritor; Powder metallurgy -- Periodicals; 671.3705
• DOI: 10.1080/00325899.2016.1254893
• Languages: English
• ISSNs: 0032-5899

Abstract

Abstract : Ferritic/martensitic oxide dispersion strengthened steel with a nominal composition of Fe–9Cr–2W–0.2Ti–0.12C–0.35Y2 O3 was produced by mechanical alloying in a high energy horizontal Simoloyer attritor. Powder samples were collected at intervals of 0.5, 1, 2, 3, 5, 7 and 10 h and analysed by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, transmission electron microscopy and differential thermal analysis. The alloying elements (Cr and W) got dissolved in the matrix in 7 h milled powder. Crystallite size decreased rapidly with milling time up to 5 h milling and reached a stable size of ∼12 nm after 7 h, whereas strain and lattice parameter were found to increase with milling time. The particle size increased up to 2 h milling and then decreased with milling time. A fine and uniform particle size of ∼25 nm was obtained after 7 h milling. The alloying process and distribution of alloying elements/Y2 O3 is studied in the present work.