Effect of Type and Morphology of Inclusions on Plastic Properties of Ultrahigh Strength Steel

XIA Zhi-xin;YANG Zhuo-yue;SU Jie;DING Ya-ling

Journal of Aeronautical Materials ›› 2008, Vol. 28 ›› Issue (5) : 17-21.

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Journal of Aeronautical Materials ›› 2008, Vol. 28 ›› Issue (5) : 17-21.

Effect of Type and Morphology of Inclusions on Plastic Properties of Ultrahigh Strength Steel

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Abstract

The type and size distribution of inclusion on G50 steel smelted by different metallurgy processes have been analyzed by SEM,EDAX.Results have indicated that tensile and yield strength are mainly affected by microstructure regardless of type and morphology of inclusions.Cohesion between NbCN and matrix is much bigger than that of between MnS and matrix.During plastic fracture,crack propagation is manipulated by the mechanism of competition in the inclusion of different type and morphology.It firstly appears in the site of inclusions which have both the poor cohesion with matrix and the shape of stress concentration,then at the inclusions with strong cohesion with matrix and stress concentration.

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ultra-high Strength / inclusion / plastic properties

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XIA Zhi-xin, YANG Zhuo-yue, SU Jie, DING Ya-ling. Effect of Type and Morphology of Inclusions on Plastic Properties of Ultrahigh Strength Steel[J]. Journal of Aeronautical Materials, 2008, 28(5): 17-21

References

SPEICH G R.Tempering of Low-Carbon Martensite[J].Transactions of the Metallurgical Society of AIME,1969,245(12):2553-2564.
GARRISON W M.Jr.Uhrahigh-strength Steels for Aero space Applications[J].JOM,1990 (5):20-24.
GOTO D M,KOSS D A,JABLOKOV V.The influence of tensile stress states on the failure of HY-100 steel[J].Metallurgical and Materials Transaction (A),1999,30:2835-2842.
TOMITA Y.Low temperature mechanical properties of quenched and tempered 0.4C-Ni-Cr-Mo STEEL AFTER CONTROLLED ROLLING[J].Materials Science And Technology,1988,4(7):613-620.
TOMITA Y.Effect of morphology of nonmetallic inclusions on tensile properties quenched and tempered 0.4C-Cr-Mo Ni steel[J].Materials characterization,1995,34:121-128.
ASTM E562-02 Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count[S].
LESLIE W C.The Physical Metallurgy of Steels[M].McGraw-Hill Int.Book Co.,Tokyo,1982,269.
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