Nanoindentation Characterization of Mechanically Alloyed Fe-Al-Si Powders

2018 ◽  
Vol 784 ◽  
pp. 15-20 ◽  
Author(s):  
Petr Haušild ◽  
Jaroslav Čech ◽  
Miroslav Karlík ◽  
Filip Průša ◽  
Pavel Novák ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Preparation Technique ◽  
X Ray Diffraction ◽  
Mechanically Alloyed ◽  
Microstructure And Mechanical Properties ◽  
Plasma Sintering ◽  
Special Sample Preparation ◽  
Spark Plasma ◽  
Powder Particles

The effect of processing conditions on microstructure and mechanical properties of Fe-Al-Si powders was studied by means of scanning electron microscopy, X-ray diffraction and nanoindentation. Fe-Al-Si alloy powder was prepared from pure elemental powders by mechanical alloying. Microstructure and mechanical properties of powders were characterized after various durations of mechanical alloying. Special sample preparation technique was developed allowing to characterize the properties of individual powder particles after each step of processing in a planetary ball mill. This step-by-step characterization allowed to find the optimum conditions for subsequent spark plasma sintering.

Microstructure and Mechanical Properties of Powder Steel 16Cr - 2Ni - Mn - Mo Obtained by Mechanical Alloying and Spark Plasma Sintering

2019 ◽  
Vol 822 ◽  
pp. 601-609 ◽  
Author(s):  
T.Y. Makhmutov ◽  
Nikolay G. Razumov ◽  
Aleksey I. Shamshurin
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Spark Plasma Sintering ◽  
Treatment Time ◽  
Powder Steel ◽  
Mechanically Alloyed ◽  
Microstructure And Mechanical Properties ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Effect Of Treatment

The present work deals with investigation of the powder stainless steel Fe-16Cr-2Ni-Mo-Mn, obtained by mechanical alloying and the study of samples obtained from mechanically alloyed powders by spark plasma sintering. The effect of treatment time on the doping process was shown. The influence of sintering conditions on the microstructure and mechanical properties of the samples was revealed.

scholarly journals Effect of SiC Nanowhisker on the Microstructure and Mechanical Properties of WC-Ni Cemented Carbide Prepared by Spark Plasma Sintering

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Xiaoyong Ren ◽  
Zhijian Peng ◽  
Zhiqiang Fu ◽  
Chengbiao Wang
Keyword(s):  
Mechanical Properties ◽  
Spark Plasma Sintering ◽  
Tantalum Carbide ◽  
Uniaxial Pressure ◽  
Cemented Carbides ◽  
X Ray Diffraction ◽  
Microstructure And Mechanical Properties ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Microscopy Examination

Ultrafine tungsten carbide-nickel (WC-Ni) cemented carbides with varied fractions of silicon carbide (SiC) nanowhisker (0–3.75 wt.%) were fabricated by spark plasma sintering at 1350°C under a uniaxial pressure of 50 MPa with the assistance of vanadium carbide (VC) and tantalum carbide (TaC) as WC grain growth inhibitors. The effects of SiC nanowhisker on the microstructure and mechanical properties of the as-prepared WC-Ni cemented carbides were investigated. X-ray diffraction analysis revealed that during spark plasma sintering (SPS) Ni may react with the applied SiC nanowhisker, forming Ni2Si and graphite. Scanning electron microscopy examination indicated that, with the addition of SiC nanowhisker, the average WC grain size decreased from 400 to 350 nm. However, with the additional fractions of SiC nanowhisker, more and more Si-rich aggregates appeared. With the increase in the added fraction of SiC nanowhisker, the Vickers hardness of the samples initially increased and then decreased, reaching its maximum of about 24.9 GPa when 0.75 wt.% SiC nanowhisker was added. However, the flexural strength of the sample gradually decreased with increasing addition fraction of SiC nanowhisker.

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