Design, manufacture, and characterization of a novel Ti-based nanocrystalline alloy

Renkó, József Bálint; Károly, Dóra; Bonyár, Attila

doi:10.1016/j.jmrt.2021.01.032

Cited by 7 publications

(5 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of the similarity are presented in the following sections. The cross-section of the sample was prepared with mechanical grinding and polishing, then cleaned in ethanol and dried in hot air [31]. Next, 2% Nital was used to etch the surface to show the microstructure which was observed by Olympus PMG3 optical inverted research metallurgical microscope.…”

Section: Resultsmentioning

confidence: 99%

Verification of the Simulated Carburizing Process in Different Bore Sizes

Rumony,

Szlancsik,

Kovács

2023

Coatings

View full text Add to dashboard Cite

Carburizing is one of the leading surface treatments in the industry. For this study, 20MnCr5 steel was gas carburized and quenched in real circumstances and simulated with Simufact software. The research investigated the dimensions and types of bores. A through and blind bore was used in this study to analyze how the geometry affects the created layer and, additionally, it takes into account the placement in the heat treatment furnace. An optical microscope and Vickers hardness tester were used to detect the changes in microstructure and measure the layer thickness. After the experiments, a simulation calculated the same variables to compare and validate the results to each other. It can be stated that the placement in the chamber did not influence the form of the high carbon content layer. The simulation and the measured results were in good agreement. The maximum hardness difference was 17%, but the calculated layer thicknesses were always between the measured data. For example, in the case of a small blind bore, the calculated layer thickness was 1.68 ± 0.18 mm, while the measured value was 1.54 ± 0.37 mm. Additionally, the hardness change in depth was similar in both cases. After this validation process, the residual stresses and plastic strains were determined. The maximum residual stresses were similar for every case, namely around 1900 MPa, while the maximum plastic strain was measured in a small blind bore with a value of 0.18. The minimum plastic strain was 0.04 in the through bore.

show abstract

Section: Resultsmentioning

confidence: 99%

Verification of the Simulated Carburizing Process in Different Bore Sizes

Rumony,

Szlancsik,

Kovács

2023

Coatings

View full text Add to dashboard Cite

show abstract

“…Solid-phase NC materials synthesis is mainly used for metals and alloys. The commonly used method of bulk-nano structuring from the solid starting phase is mechanical alloying, cryomilling [46][47][48][49][50], HEBM [51][52][53]), and spark erosion [54][55][56]. In recent years bulk-nanostructuring using the cryomilling method got wide attention among scholars because of the energy-efficient nature compared to other NC production routes.…”

Section: Processing Of Nc Materialsmentioning

confidence: 99%

“…This repetitive process of shearing and cold-welding continues for entire duration of the cryomilling. Youssef et al [51] manufactured bulk NC Al-5 wt. % Mg by mechanical alloying and studied its mechanical properties.…”

Section: Microstructural Features Of Nc Materialsmentioning

confidence: 99%

“…This can be attributed to the inherent pores created during processing, unstable grain clustering under tensile stress, and crack nucleation [34]. Youssef et al [51] fabricated NC Al-Mg alloy with high strength, 4 times as high as 5083 Al alloy. However, the achieved ductility value was limited to 8.5%, which is lower than the conventional 5083 Al alloy at around 12%.…”

Section: Mechanical Properties Of Nc Materialsmentioning

confidence: 99%

See 1 more Smart Citation

Nanocrystalline Materials: Synthesis, Characterization, Properties, and Applications

et al. 2021

View full text Add to dashboard Cite

Nanostructuring is a commonly employed method of obtaining superior mechanical properties in metals and alloys. Compared to conventional polycrystalline counterparts, nanostructuring can provide remarkable improvements in yield strength, toughness, fatigue life, corrosion resistance, and hardness, which is attributed to the nano grain size. In this review paper, the current state-of-the-art of synthesis methods of nanocrystalline (NC) materials such as rapid solidification, chemical precipitation, chemical vapor deposition, and mechanical alloying, including high-energy ball milling (HEBM) and cryomilling was elucidated. More specifically, the effect of various process parameters on mechanical properties and microstructural features were explained for a broad range of engineering materials. This study also explains the mechanism of grain strengthening using the Hall-Petch relation and illustrates the effects of post-processing on the grain size and subsequently their properties. This review also reports the applications, challenges, and future scope for the NC materials.

show abstract

“…Recent research on NC materials has revealed notable advancements in mechanical characteristics, including high tensile strength [ 6 , 7 , 8 ], high hardness [ 9 , 10 ], outstanding fatigue resistance [ 11 , 12 ], and exceptional wear resistance [ 13 , 14 ]. There are several methods for manufacturing NC materials such as high energy ball milling (HEBM) [ 15 , 16 , 17 ], cryomilling [ 18 , 19 , 20 , 21 ], rapid solidification [ 22 ], spark erosion [ 23 ], chemical precipitation [ 24 ], chemical vapor deposition (CVD) [ 25 ], etc. For solid-state powder processing, mechanical attrition methods such as HEBM and cryomilling are very effective in large-scale production [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Manufacturing Bulk Nanocrystalline Al-3Mg Components Using Cryomilling and Spark Plasma Sintering

2022

View full text Add to dashboard Cite

In the current study, pure aluminum (Al) powders were cryomilled with and without 3 wt.% pure magnesium (Mg) dopant for varying durations followed by spark plasma sintering (SPS) of powders to prepare bulk components with superior mechanical properties. The crystallite sizes were determined for powders and the bulk components by analyzing the X-ray diffraction (XRD) spectrum. The calculations indicated a reduction in crystallite size with the increase in the cryomilling duration. The results also showed a more significant decrease in the crystallite sizes for Al-3Mg samples than that of pure Al. The changes in the surface morphology of powders were characterized using scanning electron microscopy (SEM). The elemental mapping analysis at nanoscale was carried out using Energy-dispersive X-ray spectroscopy (EDX) in Scanning transmission electron microscopy (STEM). The mechanical properties of the bulk components were assessed using a Vickers Microhardness tester. The test results demonstrated an improvement in the hardness of Mg-doped components. Higher hardness values were also reported with an increase in the cryomilling duration. This article discusses the mechanisms for the reduction in crystallite size for pure Al and Al-3Mg and its subsequent impact on improving mechanical properties.

show abstract

Design, manufacture, and characterization of a novel Ti-based nanocrystalline alloy

Cited by 7 publications

References 40 publications

Verification of the Simulated Carburizing Process in Different Bore Sizes

Verification of the Simulated Carburizing Process in Different Bore Sizes

Nanocrystalline Materials: Synthesis, Characterization, Properties, and Applications

Manufacturing Bulk Nanocrystalline Al-3Mg Components Using Cryomilling and Spark Plasma Sintering

Contact Info

Product

Resources

About