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| 1 | ANALYSIS ON THE BEHAVIOR OF PRECIPITATES IN ULTRA-THIN HOT STRIP OF PLAIN LOW CARBON STEEL PRODUCED BY COMPACT STRIP PRODUCTION显示文摘This paper investigated the mechanism of precipitation and its influence upon prop-erties of ultra-thin hot strips of low carbon steel produced by CSP techniques usingexperiment and thermodynamics theory. The experimental results show that thereare lots of fine and dispersive precipitates in microstructures. By analysis, most ofaluminum nitrides are in grains, while coexisted precipitates of MnS are along grainboundaries. Coexisted precipitates compose cation-vacancy type oxides such as Al2O3in the core, while MnS is at the fringe of surface. The precipitation behavior of AlNand MnS in the hot strip is studied by thermodynamic calculation. At last, implica-tions between strengthening effect and techniques are analyzed using obtained solubilityproducts. | H.Yu,Y.L.Kang,H.B.Dong,D.L.Liu and J.FuUniversity of Science and Technology Beijing, Beijing 100083, China Manuscript received 10 October 2001 in revised form 25 January 2002 | 2002 | Acta Metallurgica Sinica(English Letters)2002，15，4： | 11 |
| 2 | γ'variant-sensitive deformation behaviour of Inconel 718 superalloy显示文摘Strengthening in Inconel 718 superalloy is derived from dislocation interaction withγ'precipitates,which exist in disk-shaped three possible orientation variants with their{100}habit plane normal to each other.The interactions between dislocations andγ'precipitates vary according to theγ'orienta-tion variants,which makes the deformation behaviour complicated and difficult to reveal experimentally.In this work,γ'variant distributions of Inconel 718 samples were tailored by ageing heat treatment under either tensile or compressive stress.Theγ'variant-sensitive deformation behaviours were then studied by in situ tensile tests via neutron diffraction at room temperature.It is demonstrated that yield-ing first takes place in grains oriented with<110>parallel to the loading direction.An identical lattice strain response to applied stress of both theγmatrix and theγ'precipitates was observed during yield-ing,suggesting that dislocations shearing through theγ'precipitates is predominant at this stage.Vari-ations in yield strength for samples with differentγ'variant distributions were observed,which can be attributed to different strengthening that arises from interactions between dislocation and differentγ'variants. | R.Y.Zhang H.L.Qin Z.N.Bi Y.T.Tang J.Araújo de Oliveira T.L.Lee C.Panwisawas S.Y.Zhang J.Zhang J.Li H.B.Dong | 2022 | Journal of Materials Science & Technology2022，，31： | 1 |
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