Influence of Milling Time on Morphology and Properties of Precursor Powders for 9Cr Oxide Dispersion Strengthened Steel

Abstract:

In order to clarify the influence of milling time on the atomized precursor powders for 9Cr-ODS (Oxide Dispersion Strengthened) steel, the morphology and microstructure of atomized powders and mechanical alloying (MA) powders with different milling time were investigated by scanning electron microscopy (SEM), laser diffraction particle size analyzer, X-ray diffraction (XRD) and Vickers-hardness tester. The experimental results showed that the atomized powders are spherical in shape with the particle size of ~ 47 μm and the grain size of ~ 2 μm. With the increase of MA time, the morphology of MA powders becomes from spherical to lamellar structure, then to equiaxed shape. The mean powder size increases firstly then decreases. The grain size decreases quickly at the initial stage of milling process (0-2 h) then trends to reach a saturation value. The Vickers-hardness increases rapidly at the initial stage of milling, then reaches a saturation value.

• Periodical: Advanced Materials Research (Volumes 887-888)
• Pages: 219-222
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.887-888.219
• Online since: February 2014
• Authors: Rui Xie*, Zheng Lu, Chen Yang Lu, Chun Ming Liu
• Keywords: Atomized Powder, Grain Size, Mechanical Alloying Time, ODS Steels, Powder Size, Vickers-Hardness

References

[1] R.L. Klueh, J.P. Shingledecker, R.W. Swindeman, et al, J. Nucl. Mater, 341(2005), 103-114.

[2] K.L. Murty, I. Charit, J. Nucl. Mater, 383(2008), 189-195.

[3] Z. Oksiuta, P. Olier, Y. de Carlan, et al, J. Nucl. Mater, 393(2009), 114-119.

[4] N. Baluc, J.L. Boutard, S.L. Dudarev et al, J. Nucl. Mater. 417 (2011) 149-153.

[5] Zheng LU, Chenyang Lu, et al, Acta. Metall. Sin, 48(2012), 649-653.

[6] G.R. Odette, M.J. Alinger, B.D. Wirth, Annu. Rev. Mater. Res. 38 (2008) 471-503.

DOI: 10.1146/annurev.matsci.38.060407.130315

[7] M. Laurent-Brocq, F. Legendre, M. -H. Mathon, et al, Acta. Mater, 60(2012), 7150-7159.

[8] R. Vijay, M. Nagini, et al, Metall. Mater. Trans A, 44(3) (2013), 1611-1620.

[9] J.R. Rieken, I.E. Anderson, M.J. Kramer, et al, J. Nucl. Mater, 428 (2012), 65-75.

[10] Chen-yang LU, Zheng LU, Chun-ming LIU. J. Nucl. Mater. 442 (2013) S148-S152.

[11] Ramar, Z. Oksiuta, N. Baluc, Fusion. Eng. Des, 82 (2007), 2543-2549.