Mechanical characterization of mechanically alloyed ultrafine-grained Ti5Si3+40vol% γ-TiAl composites

Suryanarayana, C.; Behn, Rainer; Klassen, Thomas; Bormann, R.

doi:10.1016/j.msea.2013.04.092

Cited by 14 publications

(6 citation statements)

References 48 publications

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“…It is also possible that, due to the increased ductility, the fracture toughness of these composites could be higher than that of their coarse-grained counterparts. In line with these goals, we have, in recent times, accomplished (a) achievement of a very uniform distribution of the reinforcement phases in different types of matrices, including dispersion of a high volume fraction of Al 2 O 3 in Al [49] and of Ti 5 Si 3 in γ –TiAl [50, 51], and (b) synthesis of MoSi 2 +Si 3 N 4 composites for high-temperature applications [52], among others. However, we will describe here only the development of Ti 5 Si 3 + γ –TiAl composites, as a typical example.…”

Section: Nanocompositesmentioning

confidence: 99%

Mechanical Alloying: A Novel Technique to Synthesize Advanced Materials

Suryanarayana

2019

Research

213

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Mechanical alloying is a solid-state powder processing technique that involves repeated cold welding, fracturing, and rewelding of powder particles in a high-energy ball mill. Originally developed about 50 years ago to produce oxide-dispersion-strengthened Ni- and Fe-based superalloys for aerospace and high temperature applications, it is now recognized as an important technique to synthesize metastable and advanced materials with a high potential for widespread applications. The metastable materials produced include supersaturated solid solutions, intermediate phases, quasicrystalline phases, amorphous alloys, and high-entropy alloys. Additionally, nanocrystalline phases have been produced in virtually every alloy system. Because of the fineness of the powders, their consolidation to full density without any porosity being present is a challenging problem. Several novel methods have been developed to overcome this issue. Powder contamination during milling and subsequent consolidation constitutes another issue; this can be resolved, though expensive. A number of applications have been developed for these novel materials. This review article presents an overview of the process of mechanical alloying, mechanism of grain refinement to nanometer levels, and preparation of materials such as nanocomposites and metallic glasses. The application of mechanical alloying to synthesize some advanced materials such as pure metals and alloys, hydrogen storage materials, and energy materials is described. The article concludes with an outlook on future prospects of this technique.

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Section: Nanocompositesmentioning

confidence: 99%

Mechanical Alloying: A Novel Technique to Synthesize Advanced Materials

Suryanarayana

2019

Research

213

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“…These include homogeneous dispersion of graphite in an Al6061 alloy matrix [8], dispersion of Pb in Al-Cu alloys [9], effect of clustering of the reinforcement on the mechanical properties of the composites [10], synthesis of amorphous + intermetallic composites in Al-Mg alloys [11], dispersion of a high volume fraction of Ti 5 Si 3 in ␥-TiAl [12,13], among others. This paper describes the results obtained on the homogeneous dispersion of the second phases, which are of nanometer dimensions, and consequent improvement in the mechanical behavior of such composites.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of nanocomposites by mechanical alloying

Suryanarayana

2011

Journal of Alloys and Compounds

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142

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“…In our investigations, during the past few years, we have successfully achieved a very uniform distribution of the reinforcement phases in different types of matrices through the solid-state powder processing technique of MA [36][37][38][39][40][41][42][43][44]. These include homogeneous dispersion of lead in Al and Al-Cu alloys [36], graphite in an Al-6061 alloy matrix [37], effect of clustering of the reinforcement on the mechanical properties of the composites [38], dispersion of a high volume fraction of Al 2 O 3 in Al [20] and Mg [39], SiC in Al [40], AlN in Mg [41], Ti 5 Si 3 in g-TiAl [42,43], and synthesis of MoSi 2 + Si 3 N 4 composites for high temperature applications [44]. However, in this article, we will describe our new results obtained in two systems.…”

Section: Nanocompositesmentioning

confidence: 99%

Mechanical Alloying of Nanocrystalline Materials and Nanocomposites

Suryanarayana¹

2019

Madridge J Nanotechnol Nanosci

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Mechanical alloying is an effective method to synthesize nanocrystalline metal powders in the monolithic and composite states. The process involves repeated cold welding, fracturing and rewelding of powder particles in a high energy ball mill. Although originally developed to produce oxide dispersion strengthened superalloys, the technique has been later shown to be capable of producing a variety of metastable phases including nanocrystalline materials. The present article describes the synthesis of nanocrystalline materials and nanocomposites by mechanical alloying. The basic principles of the process, process parameters that affect the constitution and microstructure of the processed powders, and the mechanisms of alloying and grain refinement, including their consolidation to full density while retaining the nanostructures, are described. Methods to achieve the smallest possible grain size are then highlighted. Typical examples of the synthesis of nanocomposites containing a high volume fraction of nanometer-sized reinforcements in aluminum, and process optimization to achieve superplastic behavior in titanium-based nanocomposites are then discussed. The ubiquitous problem of powder contamination during milling and solutions to eliminate or minimize this are also mentioned.

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Mechanical characterization of mechanically alloyed ultrafine-grained Ti5Si3+40vol% γ-TiAl composites

Cited by 14 publications

References 48 publications

Mechanical Alloying: A Novel Technique to Synthesize Advanced Materials

Mechanical Alloying: A Novel Technique to Synthesize Advanced Materials

Synthesis of nanocomposites by mechanical alloying

Mechanical Alloying of Nanocrystalline Materials and Nanocomposites

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