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Monday, August 3, 2020 | History

2 edition of effect of microstructural gradients on the superplastic forming of TI-6AL-4V found in the catalog.

effect of microstructural gradients on the superplastic forming of TI-6AL-4V

Soranat Rhaipu

effect of microstructural gradients on the superplastic forming of TI-6AL-4V

by Soranat Rhaipu

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  • 39 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D) - University of Birmingham, School of Metallurgy and Materials, Faculty of Engineering.

Statementby Soranat Rhaipu.
The Physical Object
Pagination302p. :
Number of Pages302
ID Numbers
Open LibraryOL18626081M

The Ti-6Al-4V alloy is widely used in SLM for aerospace, automotive and biomedical applications due to its unique characteristics such This paper investigates the effect of Ti-6Al-4V powder variation on the powder bed both sides of the tensile testing specimen in File Size: 1MB. Microstructural evolution of Ti-6Al-4V during high strain rate conditions of metal cutting Lei Dong, Judy Schneider Department of Mechanical Engineering Mississippi State University Abstract The microstructural evolution following metal cutting was investigated within the metal chips of : Lei Dong, Judy Schneider.

title = "Defect, microstructure, and mechanical property of Ti-6Al-4V alloy fabricated by high-power selective laser melting", abstract = "To improve the selective laser melting (SLM) productivity, a high laser power and accordingly adjusted parameters are employed to facilitate a high build by: The finer microstructural size of Ti-6Al-4V alloy castings increases both the grain and phase boundaries, and then results in the higher strength and ductility, which can be explained by the Hall-Petch mechanism. This viewpoint is also supported by the observation that the strength tends to increase as the colony size decreases [8, 13, 14].

Ti–6Al–4V specimens, which has been prior tested in fretting fatigue. 2. Materials and procedures Materials The material selected for this study was a Ti–6Al– 4V alloy, which was supplied in the form of a forged plate. The plate possessed a duplex microstructure, consisting . 2 Interfacial Microstructure and Shear Strength of Ti-6Al-4V/TiAl Laminate Composite Sheet Fabricated by Hot Packed Rolling Fantao Konga,c,*, Yuyong Chena, Deliang Zhangb aSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin ,


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Effect of microstructural gradients on the superplastic forming of TI-6AL-4V by Soranat Rhaipu Download PDF EPUB FB2

Significant thickness variation occurs in superplastic forming of sheet with a uniform microstructure. This study has shown it is possible that localised thinning can be controlled by introducing microstructural gradients into Ti–6Al–4V sheet by induction heat treatment prior to forming, in order to locally change its plastic by:   The effect of microstructural gradients, introduced by local induction heating, on the behavior of a Ti-6Al-4V sheet in superplastic forming has been investigated.

Heat treatment led to a change in the morphology of the α phase present at the start of superplastic deformation, which caused an increase in initial flow stress. This has a significant effect on the strain by: 2.

An analytical model reflecting the microstructural evolution was made on the basis of Dutta and Mukherjee's work, and applied to the superplastic bulge forming of Ti–6Al–4V alloy.

Bulge forming of fine grain ( μm) Ti–6Al–4V alloy sheets was conducted at °C, at three strain rates of ×10 −4, 5×10 −4 and 1×10 −3 s − by: The effect of thermomechanical process conditions on superplasticity of Ti-6Al-4V alloy was previously investigated [1].

It was found that the proper selection of preliminary treatment parameters Author: Maciej Motyka. Effect of process conditions on superplastic forming behaviour in Ti–6Al–4V friction stir welds Article (PDF Available) in Science and Technology of Welding & Joining 14(7) October.

Friction Stir Welding of Ti-6Al-4V was performed on 5 mm thickness plate in order to assess the affect of welding conditions on the resulting microstructure and superplastic forming behavior of the joints.

A variety of welding conditions were tested and all welds were subsequently Superplastically formed. It was found that the weld parameters do influence the microstructure and degree of Cited by: 4. Superplastic forming of titanium alloys is used for producing structural components, since it is an effective way to manufacture complex-shaped parts in a one-step operation.

An optimized sheet-forming process has been designed incorporating a non-isothermal heating system to establish a fast forming process.

This work sought to expand the advantages of the technology to the forming of Ti-6Al Cited by:   The present article evaluates the influence of independent control factors such as microstructural variation, normal load, sliding velocity, and test duration on dry sliding wear behavior of Ti-6Al-4V alloy at room temperature using a statistical approach.

Ti-6Al-4V alloy has been heat treated in a controlled manner in order to produce different microstructural features (i.e., lamellar Cited by: Non-superplastic grade Ti-6Al-4V alloy sheets with the size of x mm2 and thickness of mm were used in this research for superplastic-like forming at °C and a strain rate of s Ti-6Al-4V sheets have been successfully formed by this process within 16 min, showing much higher efficiency than the conventional superplastic.

In this study, superplastic tensile tests were carried out for Ti-6Al-4V alloy using different initial grain sizes ( μm, μm and μm) at a temperature of °C with an initial strain rate of 1× s To get an insight into the effect of grain size on the superplastic deformation mechanisms, the microstructures of deformed alloy were investigated by using an optical microscope Cited by: 4.

Since manufacturing costs and the weight of airframe structures can be reduced significantly through superplastic forming technology, considerable efforts have been devoted during the past three decades to the investigation of the superplastic deformation behavior of various metallic alloys, especially the Ti-6Al-4V alloy (UNS R, Al= Ti–6Al–4V alloy having a heterogeneous microstructure composed of ultra-fine-equiaxed-a-grains and fine-lamellar-a-grains is investigated for micro-structural changes during superplastic deformation at temperature of !C.

The Ti–6Al–4V alloy having an optimum fraction of fine-lamellar-a-grainsCited by: 7. Ti-6Al-4V is an alpha-beta titanium alloy. This alloy contains a mixture of alpha and beta phases with the beta phase accounting for % at room temperature.

The alloy Ti-6Al-4V is a difficult alloy to work due to the fact that its formability is poor even in the annealed condition making it challenging to forge. The effect of postweld heat treatment (PWHT) on ‐mm‐thick Ti‐6Al‐4V butt joints that were welded using a continuous‐wave 8‐kW ytterbium fibre laser was studied in terms of the microstructure, microtexture, number of welding defects, microhardness, residual stress distribution and high cycle fatigue (HCF) properties.

Five types of heat treatments in the temperature range of Cited by: 5. Keywords: Ti-6Al-4V, welding, defects, porosity, microstructure, fatigue. vii The effect of these aspects on mechanical properties under different appropriate, superplastic forming and superplastic forming with diffusion bonding, hot stretch forming toCited by: 1.

For EBM processed Ti-6Al-4V, elongated prior-β grains and microstructural texture has been previously observed in the z-direction [2], and it was expected that these factors would be the dominant mechanism responsible for any observed effects of Size: 1MB.

plastic forming, in order to be applied to aerospace, auto-motive, and precision machining parts, the dynamic II.

EXPERIMENTAL DONG-GEON LEE and SANGHO KIM, Research Assistants, and The material used in this study is a Ti-6Al-4V alloy plate SUNGHAK LEE and CHONG SOO LEE, Professors, are with the Center of 3 3 50 mm in size manufactured.

Microstructural characterization and its effect on mechanical properties of fiber laser beam welded Ti-6Al-4V alloy Chandan Kumar, Manas Das* Department of Mechanical Engineering Indian Institute of Technology, Guwahati -Assam, INDIA _____ Abstract.

The effect of initial deformation on hot plasticity 67 Table 1. Stereological parameters of microstructure of as received and thermomechanically processed Ti-6Al-4V alloy Condition of Ti-6Al-4V alloy Vα, % a – α, µm b – α, µm fα As received 82 4,1 5,3 0,77 Deformed with forging reduction of 20% 59,2 51,3 3,2 Influence of Alpha Casing on Superplastic Deformation of Ti-6Al-4V S.

Patankar, S. Patankar on the superplastic deformation of Ti-Al-4V was studied by applying an oxygen barrier coating onto the surface prior to superplastic forming and mechanical testing at elevated temperature. The Effect of Superplastic Deformation on Cited by: 8. An additive layer manufacturing (ALM) technique, electron beam melting, has been used for the production of simple geometries, from pre-alloyed Ti-6Al-4V powder.

Microstructure, texture and mechanical properties achieved under standard conditions have been investigated, alongside numerical modelling of the electron beam and attempts to modify solidification through the addition of by: microstructural variation of Ti-6Al-4V alloy with that of ultrasonic parameters.

Microstructural variation in terms of different volume fractions of primary alpha phase of Ti-6Al-4V alloy has been introduced as a result of solution annealing at different temperatures followed by thermal ageing.Microstructural Characterization of Ti-6Al-7Nb Alloy After Severe Plastic Deformation sections in Figure 3.

Full-width half-maximum of diffracted peaks suggest that probably some residual stress may be present after SPD processing and/or very fine crystallites can be found in .