Effect of mechanical alloying and annealing on the sintering behaviour of AstaloyCrL powders with SiC and carbon addition

Hebda, Marek; Gądek, Szymon; Skałoń, Mateusz; Kazior, J.

doi:10.1007/s10973-013-3218-9

Cited by 18 publications

(13 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, during this process, the most significant changes or structural defects of material occur, e.g., fragmentation, homogenization and particle hardening [11]. The above-mentioned effects greatly influence the subsequent sintering process of the produced mixtures that may also be observed in Figs.…”

Section: Resultsmentioning

confidence: 94%

“…A further advantage of using this chemical element as an alloy addition is its low cost, which raises the competitiveness of steel [8]. However, there are certain requirements that must be fulfilled in order to achieve the expected results while producing materials containing silicon, e.g., due to its high affinity for oxygen, it is important to use a very pure protective atmosphere during sintering [11]. On the other hand, if the sintering process is carried out improperly, the addition of silicon may decrease the material's properties.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dilatometric study of low-alloy steels with silicon carbide addition

Hebda

Dębecka

Kazior

2016

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

Low-alloy steels produced via the traditional powder metallurgy process, using a die compaction, are currently widely used. Therefore, improving their properties is an issue that attracts much attention. The most common method of enhancing the properties of a given material is introducing additives, e.g., silicon to prealloyed low-alloy steels. It may be added through the mechanical alloying process. The article presents the results of research focused on an analysis of the influence of: (1) the mechanical alloying process, (2) various amounts of silicon carbide: 1, 2 or 3 mass% and carbon addition: 0.4 or 0.6 mass%, (3) different atmospheres, reducing or inert with 10 mass% of hydrogen and (4) the effect of annealing on phenomena occurring during the sintering of low-alloy steel. Moreover, changes in the sinters' microstructure and microhardness were also investigated. Based on the results, it was found that an increase in the amount of silicon in the material causes an increase in the shrinkage of the samples, prepared using mechanical alloying, during the sintering process. This observed effect was independent of the carbon content (0.4 or 0.6 mass%) in the samples as well as of the sintering atmosphere (reducing or inert with 10 mass% of hydrogen). The smallest porosity was observed for samples sintered directly after the mechanical alloying process. There is no need to use a hydrogen atmosphere during sintering-10 % of hydrogen added to an inert, e.g., helium atmosphere is enough to sinter the samples correctly.

show abstract

Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Dilatometric study of low-alloy steels with silicon carbide addition

Hebda

Dębecka

Kazior

2016

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

show abstract

“…The DSC furnace was calibrated using melting temperatures of indium, tin, lead and zinc. The QMS was checked using calcium oxalate monohydrate (Fluka) [18,19]. For measurements, 20 mg of the dry sample was put into sealed aluminium pans with lids and heated at 5°C min -1 , from room temperature, to 550°C.…”

Section: Thermal Analysis-mass Spectrometrymentioning

confidence: 99%

Cold-induced changes in cell wall stability determine the resistance of winter triticale to fungal pathogen Microdochium nivale

Szechyńska‐Hebda

Hebda

Mirek

et al. 2016

J Therm Anal Calorim

View full text Add to dashboard Cite

The exposure of winter triticale to cold promotes genotype-dependent resistance to fungal pathogen. We present the evidence that structural and chemical modifications of the cell wall components induced by cold can be correlated with the resistance against fungal infection. Our results showed that cellulose of hardened triticale cv. Hewo (able to develop resistance after cold treatment) has more compact and integrated structure, thicker and longer fibres when compared to cv. Magnat (susceptible to fungal infection despite plant hardening). Such structure of cellulose limits water sorption, favours stronger bonding the water of crystallisation to macromolecules, impedes depolymerisation process during decomposition, and finally results in higher thermal stability of cell wall. Furthermore, the lignin composition is drastically modified in resistant plants. Pattern of the thermal decomposition indicates higher molecular mass and more complex structure of lignin, followed by the higher thermal stability. We conclude that specific structure of lignocellulosic cell wall of the resistant plants forms a barrier for fungal enzymes digesting host tissue as well as can resist better the mechanical pressure of hyphae.

show abstract

“…However, silicon has a high affinity for oxygen; therefore, its implementation is problematic during the sintering process of mixed powders. Mechanical alloying is the most useful process to obtain a combination of low-alloy steel with silicon carbide addition [7,8]. Moreover, the MA process allows to homogeneously introduce silicon to low-alloy Astaloy CrL steel [9].…”

Section: Introductionmentioning

confidence: 99%

Spark Plasma Sintering of Low Alloy Steel Modified with Silicon Carbide

Hebda¹,

Dębecka²,

Miernik³

et al. 2016

Archives of Metallurgy and Materials

Self Cite

View full text Add to dashboard Cite

The influence of adding different amounts of silicon carbide on the properties (density, transverse rupture strength, microhardness and corrosion resistance) and microstructure of low alloy steel was investigated. Samples were prepared by mechanical alloying (MA) process and sintered by spark plasma sintering (SPS) technique. After the SPS process, half of each of obtained samples was heat-treated in a vacuum furnace. The results show that the high-density materials have been achieved. Homogeneous and fine microstructure was obtained. The heat treatment that followed the SPS process resulted in an increase in the mechanical and plastic properties of samples with the addition 1wt. % of silicon carbide. The investigated compositions containing 1 wt.% of SiC had better corrosion resistance than samples with 3 wt.% of silicon carbide addition. Moreover, corrosion resistance of the samples with 1 wt.% of SiC can further be improved by applying heat treatment.

show abstract

Effect of mechanical alloying and annealing on the sintering behaviour of AstaloyCrL powders with SiC and carbon addition

Cited by 18 publications

References 19 publications

Dilatometric study of low-alloy steels with silicon carbide addition

Dilatometric study of low-alloy steels with silicon carbide addition

Cold-induced changes in cell wall stability determine the resistance of winter triticale to fungal pathogen Microdochium nivale

Spark Plasma Sintering of Low Alloy Steel Modified with Silicon Carbide

Contact Info

Product

Resources

About