In situ SEM study of tensile deformation of a near-β titanium alloy

Zhang, Saifei; Zeng, Weidong; Zhao, Qinyang; Ge, Lei; Zhang, Min

doi:10.1016/j.msea.2017.10.028

Cited by 67 publications

(17 citation statements)

References 19 publications

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“…In addition, as shown in Figure 15 a, the orientations of α p phases are randomly distributed in the bimodal microstructure. For the same α p phase, there is a large difference in SF values for basal and prismatic slips ( Figure 15 b,c); the one with the maximum SF is supposed to be the easiest to activate [ 21 ]. Therefore, it is difficult for the α p phase to activate both basal and prismatic slips simultaneously.…”

Section: Discussionmentioning

confidence: 99%

“…Huang et al [ 20 ] indicated that localized stress concentration at the GBs derived from the geometric incompatibility between neighboring α grains was mainly responsible for microcrack formation in a Ti–6Al alloy. Zhang et al [ 21 ] studied the deformation mechanism of a Ti–5Al–2Sn–2Zr–4Cr–4Mo alloy with a bimodal microstructure, implying that the α p had high compatibility of deformation and the slip line in the α p phase was the primary deformation mechanism. Shao et al [ 22 ] found that microcracks were primarily initiated along the α L phase at the edges of the sample.…”

Section: Introductionmentioning

confidence: 99%

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In Situ Observation of the Tensile Deformation and Fracture Behavior of Ti–5Al–5Mo–5V–1Cr–1Fe Alloy with Different Microstructures

Pan

Liu

et al. 2021

Materials

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The plastic deformation processes and fracture behavior of a Ti–5Al–5Mo–5V–1Cr–1Fe alloy with bimodal and lamellar microstructures were studied by room-temperature tensile tests with in situ scanning electron microscopy (SEM) observations. The results indicate that a bimodal microstructure has a lower strength but higher ductility than a lamellar microstructure. For the bimodal microstructure, parallel, deep slip bands (SBs) are first noticed in the primary α (αp) phase lying at an angle of about 45° to the direction of the applied tension, while they are first observed in the coarse lath α (αL) phase or its interface at grain boundaries (GBs) for the lamellar microstructure. The β matrix undergoes larger plastic deformation than the αL phase in the bimodal microstructure before fracture. Microcracks are prone to nucleate at the αp/β interface and interconnect, finally causing the fracture of the bimodal microstructure. The plastic deformation is mainly restricted to within the coarse αL phase at GBs, which promotes the formation of microcracks and the intergranular fracture of the lamellar microstructure.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In Situ Observation of the Tensile Deformation and Fracture Behavior of Ti–5Al–5Mo–5V–1Cr–1Fe Alloy with Different Microstructures

Pan

Liu

et al. 2021

Materials

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“…Post mortem analysis of samples can show what processes have occurred within the materials microstructure but advances in in-situ stages allow for direct observation of microstructural evolution during both deformation and annealing [13][14]. In-situ techniques have been employed to observe the deformation mechanisms of various materials such as aluminium and steel [15][16]; in-situ annealing trials have also been conducted on said materials [17][18].…”

Section: Introductionmentioning

confidence: 99%

Microstructural evolution of 316L austenitic stainless steel during in-situ biaxial deformation and annealing

Taylor

Kotadia

2020

Materials Characterization

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Austenitic stainless steel 316L was investigated by a combination of in-situ biaxial straining and subsequently by in-situ annealing within a Carl Zeiss Sigma FEG-SEM. A Micromecha Proxima stage was used to impart biaxial strain on the sample, results were compared with macro scale testing to validate the method, physical properties were established in close correlation to macro scale tests. Samples were subsequently subjected to annealing cycles using a Gatan Murano 525 heated stage to assess the influence of imparted strain on the recrystallization kinetics of the material. Following annealing trials the material was observed to initiate recrystallization around 100 °C earlier within heavily strained samples at 750 °C in comparison to 850 °C within unstrained samples.

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“…Understanding the deformation behavior of α p is useful to improve the deforming capabilities of the material. Many studies have devoted to the process of strain-induced twinning [2], slip transmission [3,4], active slip system [5,6], and the effect of strain rate [7,8] on the titanium alloys with dual phases using tension or compression experiments. Besides, it was found in the aluminum alloy that grain rotation would undergo under the plastic deformation [9,10].…”

Section: Introductionmentioning

confidence: 99%

In-situ EBSD characterization of deformation behavior of primary alpha phase in Ti-6Al-4V

Yamasaki

Mitsuhara

et al. 2020

MATEC Web Conf.

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Uniaxial tension experiments and electron back-scatter diffraction were performed on a bimodal Ti-6Al-4V alloy to study the deformation behavior of primary hcp-Ti (αp). It was found that the obtained tensile strength and elongation of the studied Ti-6Al-4V from the in-situ tensile test are higher than of which derived from the regular tensile test. The strain could be accommodated by the activation of slip systems and by grain rotations during the deformation. The prismatic slip is the primary slip mode of αp. According to kernel average misorientation analysis, we found that the dislocations mainly distributed near grain boundaries and subgrain boundaries, and partially located around slip lines. Calculated rotation angles and average rotation rates show that the rotation heterogeneity occurred among grains and subgrains.

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In situ SEM study of tensile deformation of a near-β titanium alloy

Cited by 67 publications

References 19 publications

In Situ Observation of the Tensile Deformation and Fracture Behavior of Ti–5Al–5Mo–5V–1Cr–1Fe Alloy with Different Microstructures

In Situ Observation of the Tensile Deformation and Fracture Behavior of Ti–5Al–5Mo–5V–1Cr–1Fe Alloy with Different Microstructures

Microstructural evolution of 316L austenitic stainless steel during in-situ biaxial deformation and annealing

In-situ EBSD characterization of deformation behavior of primary alpha phase in Ti-6Al-4V

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