The evolution of microstructure during the processing of gamma Ti−Al alloys

Sha, Wei

doi:10.1007/s11837-006-0085-x

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…For the second part of present work, with regards to another effective way to refine the grain size of the TiAl-based alloys, meaning through thermo--mechanical (TM) processing of the as-cast alloy, papers, such as [21,23,24], report different possibilities of TM processing, for which the dimensions of the initial grains are indicated to be at the same value or even higher than those obtained for present studied alloy (about 30 µm). For this reason, this initial dimension of the obtained cast alloy can be considered that represents a good value for further successful thermomechanical treatments.…”

Section: Resultsmentioning

confidence: 99%

intermetallics, thermo-mechanical processing, microstructure, scanning electron microscopy (SEM), XRD spectra, micro-hardness test

CINCA¹,

RADUCANU²,

NOCIVIN³

et al. 2016

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The formation of a high quality as-cast structure for the Ti-46Al-6.5Nb-0.5Ta-1Cr-0.3Ni--0.2Si (at.%) alloy, with a new alloying concept, and also the application of a thermomechanical (TM) processing scheme was the subject of present investigation. The investigations consisted of structural and mechanical characterizations of the alloy in 6 different structural conditions: S1 -in cast state, S2 -after a heat treatment of homogenization, S3-S6 -after a TM processing scheme. The micro-structural investigations were performed using a SEM analyzing system, and an X-ray diffractometer. The investigations of mechanical properties have been based on tensile strength, modulus of elasticity, elongation to fracture measurements and fracture surface analysis for the as-cast sample, and on micro-hardness measurements for the TM processed samples. The alloy in cast condition, with specific nearlamellar morphology, has a homogeneous, fine-grained structure (d ∼ 30 µm), and no axial texture. Thus, a grain refinement of new proposed alloy was achieved. For the TM processed specimens, the micro-hardness measurements have revealed a proper concordance between HV values and micro-structural evolution of the samples, being argued and analyzed after each TM processing step. The presented results can underline that the new proposed alloy can be TM processed around 1200 • C, starting from an optimized as-cast structure. K e y w o r d s : intermetallics, thermo-mechanical processing, microstructure, scanning electron microscopy (SEM), XRD spectra, micro-hardness test

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Section: Resultsmentioning

confidence: 99%

intermetallics, thermo-mechanical processing, microstructure, scanning electron microscopy (SEM), XRD spectra, micro-hardness test

CINCA¹,

RADUCANU²,

NOCIVIN³

et al. 2016

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“…Huang [13] studied the displacement field and the strain field of the fatigue crack tip on HPVs by the moiré interferometry method. Sha [14] determined the elastic-plastic strain, the size of the plastic zone and COD date around the crack tip on the HPV by the moiré method. The experiments results were agreed well with those calculated by the theory formulation and the four kinds of COD design curves.…”

Section: Optical Measurement Methodsmentioning

confidence: 99%

A Brief Review on Measurement Methods and Application of Ultra High Pressure Vessels Employed in Food Processing in China

Liu

Zhang

2013

AMM

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A review of conventional and optical measurement methods of ultra high pressure vessels (UHPVs) in-service was introduced. Typical engineering applications of these technologies were illustrated. The new trends of inspection methods of UHPVs were discussed. Owe to full-field, non-destructive imaging characteristics with high precision and sensitivity, optical measurement methods had gained more and more attention in recent years. Therefore, DIC was suggested to be developed for experimental inspection of UHPVs in 2D or 3D surface shape and deformations.

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