tem study of mechanically alloyed and hot extruded aluminum

(PDF) Constitutive description of high temperature creep in

Experimental material and testing techniqueThe subject of testing was four A1-C-O mechanically alloyed materials (marked AIC0, AIC1, AIC2 and AIC202), supplied by Erbsl6h, FRG. They were produced from aluminum powder containing about 0.4 wt.% 02 by milling with graphite in an attritor under argon atmosphere, cold isostatic pressing to a bar, annealing for 6-8 h at 823 K and final

Mechanical properties and microstructure of cast oxide

Hong et al. [19] mechanically alloyed commercially pure aluminum with 10, 20 and 30 vol.% SIC particles as small as 0.66 urn. The much improved distribution of Sic resulted in high compressive proof strength values (309 MPa, 420 MPa and

Enhancement of Mechanical Properties of Aluminum and

16 Kaloshkin SD, Tcherdyntsev VV, Laptev AI, Stepashkin AA, Afonina EA, Pomadchik AL, et al. Structure and mechanical properties of mechanically alloyed Al/Al-Cu-Fe composites. Journal of Materials Science. 2004;39(16):5399-5402. [ Links ] 17 Kaloshkin

Microstructure and mechanical properties of 7075

Nanostructured composites of 7075 aluminum alloy and carbon coated silver nanoparticles were produced by mechanical milling and indirect hot extrusion. The milling products were obtained in a high energy SPEX ball mill, and then were compacted by uniaxial

Strain heterogeneity and the production of coarse grains in mechanically alloyed iron

The alloyed powder is then canned and hot-extruded; the microstructure at this stage consists of fine ( 0.5 m) equiaxed grains of ferrite [3]. Subsequent annealing at exceptionally high temperatures, of the order of 0.9 of the absolute melting temperature, causes

(PDF) Fabrication and mechanical properties of MWCNTs

Academia.edu is a platform for academics to share research papers. RARE METALS Vol. 31, No. 4, Aug. 2012, p. 372 DOI: 10.1007/s12598-012-0523-6 Fabrication and mechanical properties of MWCNTs-reinforced aluminum composites by hot extrusion Mortazavi

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The mechanically alloyed powders have been characterized by XRD, SEM, TEM, DSC and chemical analysis. Ni-Al mixtures with nominal aluminum contents in the range from 55 to 70 atomic % mainly containing the NiAl-type intermetallic phase after sufficiently long milling times.

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The mechanically alloyed powders have been characterized by XRD, SEM, TEM, DSC and chemical analysis. Ni-Al mixtures with nominal aluminum contents in the range from 55 to 70 atomic % mainly containing the NiAl-type intermetallic phase after sufficiently long milling times.

EFFECT OF REINFORCEMENT CONTENT AND CONSOLIDATION PROCEDURES ON PROPERTIES OF ALUMINUM

Properties of Aluminum–Boron Carbide Nano-Composites 591 by two method 1) cold pressing at 350 MPa and hot extrusion in 520 oC 2) Cold pressing at 450 MPa and sintering in a tube furnace in 620 oC for 2h.The densities of samples were measured by

Recrystallization suppression through dispersion

The billets, comprised of hot isostatically pressed (hipped), mechanically alloyed powder, were hot- and cold-rolled to produce a 0.5-mm-thick sheet with a strong (100)110 deformation texture. Light and transmission electron microscopy established that recrystallization initiated by nucleation at

How and why alloying elements are added to aluminum

There are many aluminum alloys used in industry today - over 400 wrought alloys and over 200 casting allloys are currently registered with the Aluminum Association. Certainly one of the most important considerations encountered during the welding of aluminum is the identification of the aluminum base alloy type to be welded.

Metals

Cu 60 Zr 30 Ti 10 metallic glass powder was prepared by mechanically alloying a mixture of pure Cu, Zr, and Ti powders after 5 h of milling. Cu 60 Zr 30 Ti 10 bulk metallic glass (BMG) was synthesized by vacuum hot pressing the as-milled Cu 60 Zr 30 Ti 10 metallic glass powder at 746 K in the pressure range of 0.72–1.20 GPa, and the structure was analyzed through X-ray diffraction and

N AMBIENT TEMPERATURE PROPERTIES OF PM ALUMINUM

Alloy rod was extruded from vacuumj hot prse blkft of helium gas atomized, mechanically alloyed. and atomized plus mchanicalty alloyed powder. Microetructure and mechanical properties we fully cheracterized to eseesa the effect of disperoids on and 3

(PDF) Microstructural study of a mechanically alloyed ODS

Microstructural study of a mechanically alloyed ODS superalloy Mohammad Mujahid IntroductionSince the initial introduction of superalloys to jet engines, much research has been directed toward improving the materials in order to meet the continual demand for increased power and longer engine lives with corresponding decreased maintenance.

Advanced TEM characterization of oxide nanoparticles

Dou P, Kimura A, Kasada R, Okuda T, Inoue M, Ukai S, Ohnuki S, Fujisawa T, Abe F (2014) TEM and HRTEM study of oxide particles in an Al-alloyed high-Cr oxide dispersion strengthened steel with Zr addition. JNM 444:441–453 CrossRef Google Scholar

Establishing a Scientific Basis for Optimizing Compositions,

Blended elemental (BE) Ti-24 at. pct Al-11 at. pct Nb (Ti-24-11) and Ti-55 at. pct Al (Ti-55) powders and prealloyed (PA) Ti-24-11 powders were mechanically alloyed in a SPEX mill or an attritor. After SPEX milling for 10 hours, the BE Ti-24-11 powder contained the B2/bcc phase, while the BE Ti-55 powder showed the presence of an amorphous phase.

Structural features of mechanically alloyed Al–PbO and

2003/5/25Extruded rods of Al–PbO and Al–PbO–WO 3 alloys were produced from the mechanically alloyed powders. The mixtures of 99.7% purity aluminum powder and 99.9% purity of PbO and WO 3 powders were mechanically alloyed under a flowing argon atmosphere

mecnicas do ao 14Cr ODS. 4) 5) 6) 7) "The study of the

0.29Mn, 0.32Si, 0.17Ni was mechanically alloyed with 0.3 wt% Y 2O 3 under hydrogen atmosphere within a vertical attritor. Subse-quently, the material was hot extruded in the form of bars at 1100 C and finally annealed for 1.5 h at 1050 C.

Tribological and Mechanical Properties of

The bulk Al–Cu-multiwall carbon nanotube (MWCNT) nanocomposite was prepared using mechanical alloying (MA) and hot extrusion processes. Al–4 wt % Cu powder mixture was first milled for 20 h to form the nanostructured Al(Cu) solid solution. The MWCNT was then added to the Al(Cu) powder mixture and further milled for 5 h. X-Ray Diffraction (XRD) and Differential Thermal Analysis (DTA) were

The Oxide Coarsening and its Influence on Recrystallization in a Mechanically Alloyed

4 The extruded bar was then further hot-rolled, and finally, cold rolled to 17.3 mm diameter. Figure 1 shows the processing history used from ball milling to the final fine-grained bar. The material shows an exceptional oxidation and corrosion resistance, due to the

A FUNDAMENTAL STUDY OF Pi'M PROCESSED ELEVATED vi1 TEMPERATURE ALUMINUM

mechanically alloyed (MA) and subsequently hot extruded to full density. The MA alloy is stronger than the non MA alloy at temperatures up to about 3000C. In addition, MA enhances microstructural stability at elevated temperature; for example there is no9

(PDF) Generation of Nanosized Particles during Mechanical

Total and lattice thermal conductivities for n-type extruded alloys as low as 1.019 W 1 m 1 K 1 and 0.465 W 1 m 1 K 1 have been observed. CONCLUSIONSHRTEM observations and examinations of SAED patterns of mechanically alloyed bismuth

How and why alloying elements are added to aluminum

There are many aluminum alloys used in industry today - over 400 wrought alloys and over 200 casting allloys are currently registered with the Aluminum Association. Certainly one of the most important considerations encountered during the welding of aluminum is the identification of the aluminum base alloy type to be welded.

(PDF) Generation of Nanosized Particles during Mechanical

Total and lattice thermal conductivities for n-type extruded alloys as low as 1.019 W 1 m 1 K 1 and 0.465 W 1 m 1 K 1 have been observed. CONCLUSIONSHRTEM observations and examinations of SAED patterns of mechanically alloyed bismuth

Effect of Ti Addition and Mechanical Alloying on Mechanical Properties of an AA7050 Extruded

Figure 2. Microstructures by TEM of AA7050 –1% Ti alloy extruded at 400 C Table I. Tensile properties of AA7050 aluminium alloy, with and without 1% Ti addition, obtained by hot extrusion of mechanically alloyed powders, and 7050 T7 commercial alloy (%)

HRTEM Study of Oxide Nanoparticles in 16Cr

HRTEM Study of Oxide Nanoparticles in 16Cr-4Al-2W-0.3Ti-0.3Y2O3 ODS Steel Luke L. Hsiung 1, Michael J. Fluss, Mark A. Wall, Akihiko Kimura2 1Lawrence Livermore National Laboratory Physical and Life Sciences Directorate L-352, P.O. Box 808 Livermore

Anna Kula

The as extruded and annealed samples were examined by means of SEM, TEM and X-ray analysis. Heavily refined matrix grains and particles of cerium oxides were observed in the as extruded material. Fine microstructure attained by mechanical alloying and high affinity of oxygen to aluminum-magnesium matrix results in promoted solid state reactions between the matrix and reinforcements at elevated

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