Journal ArticleDOI
Microstructure evolution in Fe–Mn–C during step sintering
TLDR
In this paper, the authors investigated the microstructure and microcomposition of fine ferromanganese particles in dry 25%H2 + 75%N2 for 3 min at 770, 1040, 1080, 1170 and 1220°C.Abstract:
Mn was introduced, with graphite, as fine ferromanganese particles to form compacts of Fe–3%Mn–0·5%C. Each was sintered in dry 25%H2 + 75%N2 for 3 min at 770, 1040, 1080, 1170 and 1220°C respectively, held for 3 min and quenched. The surface of a successively heated specimen was similarly examined. Specimens were sectioned and, especially the reacting ferromanganese particles and adjoining regions, investigated using light and scanning electron microscopy and EDX. Development of microstructure and microcompositions during sintering was related, from 740°C, to diffusion and condensation of Mn vapour on iron particle surfaces and subsequent chemical reactions. Above 1080°C microstructures included features resulting from a transient liquid phase, in accord with a ∼45 wt%Mn ternary eutectic calculated by ThermoCalc. The thicknesses of the highly Mn enriched regions were substantially higher than those resulting from bulk Mn diffusion in the Fe lattice; our interpretation invokes predominant operation...read more
Citations
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Journal ArticleDOI
Effects of microstructure and heat treatment on mechanical properties and corrosion behavior of powder metallurgy derived Fe–30Mn alloy
TL;DR: In this article, a phase transformation for powder metallurgy derived Fe-Mn alloys with respect to the particle size of the iron (Fe) powder and the extent of manganese (Mn) diffusion and alloying during sintering was studied.
Book ChapterDOI
The Sintering Behaviour of Fe-Mn-C Powder System, Correlation between Thermodynamics and Sintering Process, Manganese Distribution and Microstructure Composition, Effect of Alloying Mode
Eduard Hryha,Eva Dudrova +1 more
TL;DR: In this article, the authors proposed a powder-metallurgy (PM) concept utilizing unique production cycle, consisting of powder compaction and sintering steps that give high productivity with low energy consumption and high material utilization.
Journal ArticleDOI
Neutron diffraction investigation of vacuum sintering in a binary Fe/Mn powder mixture
Zhigang Xu,Zhigang Xu,Klaus-Dieter Liss,Michael A. Hodgson,Keke Chang,Gang Chen,Muhammad Dilawer Hayat,Xiaowen Yuan,Peng Cao +8 more
TL;DR: In this paper, the sublimation of Mn and microstructural evolution of binary Fe/Mn compacts sintered at various temperatures in a vacuum were investigated, and the phase evolution in the binary elemental compacts was clarified using in situ neutron diffraction.
Journal ArticleDOI
Dry sliding wear behaviour of low alloyed sintered steels in relation to microstructure and fracture behaviour
TL;DR: In this article, the effect of chemical composition and two different processing conditions, industrial atmosphere at 1453 K (1180°C) and vacuum atmosphere at 1513 K (1240°C), related to a new proposed type of sinterhardening process, was investigated.
Dissertation
Development of Ternary Fe-Mn-Si Biodegradable Alloys via Powder Metallurgy
TL;DR: In this paper, the authors present a table of acknowledgements of the authors of this paper. Table 4.1.4.1, Table 5.3.2, Table 6.
References
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Journal ArticleDOI
The Impurity‐Drag Effect in Grain Boundary Motion
TL;DR: In this paper, the drag on a grain boundary produced by an impurity atmosphere is examined in detail, and is found to depend on the velocity of the grain boundary relative to the diffusivity of the impurity and its interaction with the grain boundaries.
Journal ArticleDOI
Processes in PM steel compacts during the initial stages of sintering
TL;DR: In this article, it was shown that surface chemistry is changed within fairly narrow temperature intervals, the position of which depends on the composition of the powder particles and in part on pretreatment.
Book
Advances in Powder Metallurgy & Particulate Materials 1997 : proceedings of the 1997 International Conference & Exhibition on Powder Metallurgy & Particulate Materials sponsored by the Metal Powder Industries Federation and APMI International, June 29 - July 2, Chicago, Illinois
Robert A. McKotch,Richard Webb +1 more
Journal ArticleDOI
Tensile properties of Fe-3Mn-0·6/0·7C steels sinteredin semiclosed containers in dry hydrogen, nitrogen and mixtures thereof
TL;DR: In this paper, the tensile properties of powder metallurgy 3% manganese-0·8% carbon (content of green compact) steels were determined following laboratory sintering in (nearly) full, semiclosed containers with no getter powders in dry, 0-100% hydrogen-nitrogen atmospheres.
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