Microstructure Formation of High Pressure Torsion Processed (α + γ) Two Phase Stainless Steel

Mie Ota; Daiki Nanya; Sanjay Kumar Vajpai; Kei Ameyama; Kaveh Edalati; Zenji Horita

doi:10.4028/www.scientific.net/MSF.879.1365

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HomeMaterials Science ForumMaterials Science Forum Vol. 879Microstructure Formation of High Pressure Torsion...

Microstructure Formation of High Pressure Torsion Processed (α + γ) Two Phase Stainless Steel

Abstract:

(α + γ) two phase stainless steel (Fe-21%Cr-4.8%Ni-1.5%Mo) powder was processed by high pressure torsion (HPT) and consolidation at room temperature. The received powder had fully α single phase due to the rapid cooling during gas atomizing process. Specimens after HPT process were heat treated at 1173K for 3.6ks. It was revealed that the decomposition of α phase to γ took place during the heat treatment. Detailed microstructure observation showed that an equiaxed (α + γ) micro-duplex structure was developed and its average grain size was approximately 3.2 micrometers. The same heat treatment given to the material without HPT resulted in a coarse two phase microstructure.Therefore, it is considered that an ultra fine grained microstructure was caused by increasing of nucleation sites for γ phase due to severe plastic deformation (SPD) of HPT process. Electron backscatter diffraction patterns (EBSD) analysis indicated that α phase has a {110}/ND strong texture, that is, the α phase seems to have single orientated coarse grain structure. The γ precipitates indicated a {111}/ND strong texture, and the crystallographic orientation relationship of Kurdjumov-Sachs was observed.

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Periodical:

Materials Science Forum (Volume 879)

Pages:

1365-1368

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.1365

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Online since:

November 2016

Authors:

Mie Ota*, Daiki Nanya, Sanjay Kumar Vajpai, Kei Ameyama, Kaveh Edalati, Zenji Horita

Keywords:

Kurdjumov-Sachs Crystallographic Relationship, Micro-Duplex Structure, Nanocrystalline Structure, Precipitation, Severe Plastic Deformation (SPD), Texture

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References

[1] J.H. Westbrook, R.L. Fleischer, Intermetallic compounds, principles and practice, Vol. 1, Chichester, John Wiley & Sons, (1995).

Google Scholar

[2] R.Z. Valiev, Y. Estrin, Z. Horita, T.G. Langdon, M.J. Zehetbauer, Y.T. Zhu, JOM 2006, 58 (4), 33-39.

Google Scholar

[3] G. Sakai, Z. Horita, T.G. Langdon, Material Sci. Eng. A, 393 (2005) 344-351.

Google Scholar

[4] R.Z. Valiev, R.K. Islamgaliev, I.V. Alexandrov, Prog. Mater Sci, 45 (2000) 103-89.

Google Scholar

[5] E.Y. Yoon, D.J. Lee, D.H. Ahn, E.S. Lee, H.S. Kim, J Mater Sci, 47 (2012) 7770-6.

Google Scholar

[6] N. Tsuji, J. Japan Ins. Light Met., 62(2012) 392-397.

Google Scholar

[7] Y. Cao, Y.B. Wang, X.H. An, X.Z. Liao, M. Kawasaki, S.P. Ringer, T.G. Langdon, Y. T. Zhu, Acta Materialia, 63 (2014) 16-29.

Google Scholar

[8] G.V. Kurdjumov, G. Sachs, Z. Phys., 64 (1930) 325-343.

Google Scholar

[9] M. Kawasaki, R.B. Figueiredo, T.G. Langdon, Acta. Mater, 59 (2011) 308-316.

Google Scholar

[10] E.A. Korznikova, SYu Mironov, A.V. Korznikov, A.P. Zhilyaev, T.G. Langdon, Mater Aci Eng A, 556 (2012) 437-445.

DOI: 10.1016/j.msea.2012.07.010

Google Scholar