scispace - formally typeset
Search or ask a question
Journal ArticleDOI

Effect of milling speed on the formation of Ti-6Al-4V via mechanical alloying

01 Sep 2018-Vol. 430, Iss: 1, pp 012030
About: The article was published on 2018-09-01 and is currently open access. It has received 5 citations till now.
Citations
More filters
Journal ArticleDOI
01 Oct 2019
TL;DR: In this paper, the authors acknowledge the financial support of the department of Science and Technology (DST) South Africa and the University of Pretoria (UPS) for research in South Africa.
Abstract: Authors acknowledge the financial support of the department of Science and Technology (DST) South Africa. The technical support of the Council of Scientific and Industrial Research (CSIR) and the contribution of the University of Pretoria is acknowledged as well.

5 citations


Cites background or methods from "Effect of milling speed on the form..."

  • ...Ti-Nb alloys have been prepared by different powder metallurgy routes and casting techniques, producing alloys with different microstructures and mechanical properties [6-8]....

    [...]

  • ...This alloying process produces homogeneous materials that are prepared by mixing pure or pre-alloyed powders and then milled together with a grinding medium such as grinding steel balls [6], [7]....

    [...]

Journal ArticleDOI
TL;DR: In this paper, a high-energy ball mill was used to mill a mixture of CP Ti and Al to produce titanium aluminide powder, which was analyzed using SEM with EDX and XRD to investigate the chemical homogeneity and the formation of phases after the mechanical alloying technique.

3 citations

DOI
02 Nov 2021
TL;DR: In this paper, the authors performed the plasma spheroidisation of metal powders and determined the properties of the powder relevant for powder bed fusion that were determined included the particle size distribution, morphology, particle porosity and chemical composition.
Abstract: Metal powders suitable for use in powder bed additive manufacturing processes should ideally be spherical, dense, chemically pure and of a specified particle size distribution. Ti6Al4V is commonly used in the aerospace, medical and automotive industries due to its high strength-to-weight ratio and excellent corrosion resistance properties. Interstitial impurities in titanium alloys have an impact upon mechanical properties, particularly oxygen, nitrogen, hydrogen and carbon. The plasma spheroidisation process can be used to spheroidise metal powder consisting of irregularly shaped particles. In this study, the plasma spheroidisation of metal powder was performed on Ti6Al4V powder consisting of irregularly shaped particles. The properties of the powder relevant for powder bed fusion that were determined included the particle size distribution, morphology, particle porosity and chemical composition. Conclusions were drawn regarding the viability of using this process to produce powder suitable for additive manufacturing.

2 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of milling time on structural, morphological, and mechanical properties of the Ti50Al40X10 nanostructured alloy has been investigated.
Abstract: The aim of this study is to fabricate the Ti50Al40X10 nanostructured alloy (X: V) from pure titanium, aluminium, and vanadium powders by using a high-energy planetary ball mill with increasing milling time from 10 to 80 h. Morphology, structural, and mechanical properties of this alloy were investigated by a SEM, XRD, and nano-indentation testing. The effect of milling time on structural, morphological, and mechanical properties has been investigated. Microstructural characterisation showed a decrease of average particle size during milling time. Crystallite size decreased from 49 to 6.02 nm and lattice strain increased from 0.15% to about 0.89% during mechanical alloying. In addition, the mechanical properties of Ti50Al40V10 nanostructured materials were strongly depended on the microstructure and crystallite size of new phases that appear during mechanical milling. Microhardness of the Ti50Al40V10 alloy increases with milling time from 261 to 738 Hv. These changes could be attributed to the crystallite size and the strain variations during milling.

1 citations


Cites background from "Effect of milling speed on the form..."

  • ...Owing to the intensive work hardening of ductile metallic particles, the hardness value increases significantly until 10 h of milling [21]....

    [...]

Journal ArticleDOI
TL;DR: Pore functionally graded scaffolds (PFGS) were successfully produced via the powder metallurgical space holder technique as a result of the evaporation of magnesium (Mg) particles as mentioned in this paper.
Abstract: Pore functionally graded scaffolds (PFGS) were successfully produced via the powder metallurgical space holder technique as a result of the evaporation of magnesium (Mg) particles. The arra...

1 citations

References
More filters
Journal ArticleDOI
TL;DR: In this article, the morphology and substructure of α′ martensite in Ti-6Al-4V cuboid samples produced by selective laser melting (SLM) have been investigated to explore the formation mechanism and control method.

527 citations

Journal ArticleDOI
TL;DR: It was found that elongated α’/α grains can be fragmented into equiaxial grains through applying a high temperature annealing strategy and bi-modal microstructures achieve a superior tensile ductility to current heat treated selective laser melting produced Ti-6Al-4V samples.
Abstract: Current post-process heat treatments applied to selective laser melting produced Ti-6Al-4V do not achieve the same microstructure and therefore superior tensile behaviour of thermomechanical processed wrought Ti-6Al-4V. Due to the growing demand for selective laser melting produced parts in industry, research and development towards improved mechanical properties is ongoing. This study is aimed at developing post-process annealing strategies to improve tensile behaviour of selective laser melting produced Ti-6Al-4V parts. Optical and electron microscopy was used to study α grain morphology as a function of annealing temperature, hold time and cooling rate. Quasi-static uniaxial tensile tests were used to measure tensile behaviour of different annealed parts. It was found that elongated α’/α grains can be fragmented into equiaxial grains through applying a high temperature annealing strategy. It is shown that bi-modal microstructures achieve a superior tensile ductility to current heat treated selective laser melting produced Ti-6Al-4V samples.

146 citations

01 Jan 2002
TL;DR: In this article, phase transformations and fatigue properties of the Ti-6Al-4V alloy were investigated and the need to weld the alloy for certain engine components can expose the alloy loca.
Abstract: The research described in the thesis concerns phase transformations and fatigue properties in the Ti-6Al-4V alloy. The need to weld the alloy for certain engine components can expose the alloy loca ...

98 citations

Journal ArticleDOI
TL;DR: In this paper, ultrafine equiaxed grains with a size of 150 to 800 nm were successfully produced in a Ti-6Al-4V alloy through thermomechanical processing of a martensitic starting microstructure.
Abstract: In the current study, ultrafine equiaxed grains with a size of 150 to 800 nm were successfully produced in a Ti-6Al-4V alloy through thermomechanical processing of a martensitic starting microstructure. This was achieved through a novel mechanism of grain refinement consisting of several concurrent processes. This involves the development of substructure in the lath interiors at an early stage of deformation, which progressed into small high-angle segments with increasing strain. Consequently, the microstructure was gradually transformed to an equiaxed ultrafine grained structure, mostly surrounded by high-angle grain boundaries, through continuous dynamic recrystallization. Simultaneously, the supersaturated martensite was decomposed during deformation, leading to the progressive formation of beta phase, mainly nucleated on the intervariant lath boundaries.

86 citations

Journal ArticleDOI
TL;DR: In this paper, the structural and morphological changes of powders were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), differential thermal analysis (DTA) and microhardness measurements.

34 citations