Microstructure and cyclic deformation behavior of a 3D-printed Ti–6Al–4V alloy

Zhang, Y.L.; Chen, Z.; Qu, Shoujiang; Feng, A.H.; Mi, Guangbao; Shen, Jun; Xu, Huibin; Chen, D.L.

doi:10.1016/j.jallcom.2020.153971

Cited by 25 publications

(10 citation statements)

References 74 publications

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“…However, instead of a laser, a high-power electron beam is employed which needs a high vacuum in the range of 10 À4 -10 À5 mbar. [69,70] The powders are preheated to avoid defects that arise due to the charging of electrons, which leads to the spreading of powders. This is also referred to as powder pushing, smoke, and powder blowing.…”

Section: Selective Electron Beam Meltingmentioning

confidence: 99%

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

Bajaj,

Feng,

et al. 2023

Adv Eng Mater

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The 3D‐printing of high‐entropy alloys (HEAs) is capable of enhancing the design and manufacturing flexibilities for the novel materials. Owing to the rapid solidification, the 3D‐printed HEAs exhibit markedly different microstructures than their conventionally‐manufactured equivalents, leading to peculiar mechanical properties. Many additively‐manufactured HEAs also break down the strength‐ductility trade‐off dilemma. Novel dynamics regarding the simultaneous and sequential nature of deformation mechanisms are emerging through recent intensive research on these materials. Herein the deformation behavior of 3D‐printed HEAs is reviewed and explained on the basis of the latest advances in this area. A comprehensive picture regarding the role of cellular dislocation networks, twinning‐induced plasticity (TWIP), and transformation‐induced plasticity (TRIP) in the monotonic and cyclic deformation of 3D‐printed HEAs is presented. Special emphasis is placed on fatigue characteristics due to the enormous interest in this burgeoning area. The effect of post‐fabrication thermomechanical processing on plasticity is discussed along with the microstructural evolution in the 3D‐printed HEAs. Several innovative developments that carry latent potential for further research are also deliberated in this review. Finally, the present understanding of the deformation behavior of 3D‐printed HEAs is summarized while gauging the future directions.This article is protected by copyright. All rights reserved.

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Section: Selective Electron Beam Meltingmentioning

confidence: 99%

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

Bajaj,

Feng,

et al. 2023

Adv Eng Mater

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“…Prismatic <a> slip was regarded as the main slip mode in hcp metals, such as α titanium and α zirconium [23,[48][49][50], because it had the lowest critical resolved shear stress (CRSS) in the α phase. In general, the c/a ratio in the unit cell of hcp materials would reflect the slip modes.…”

Section: Slip Mode Number Of Slip Systems Taylor Axis Number Of Varia...mentioning

confidence: 99%

Active Slip Mode Analysis of an Additively Manufactured Ti-6Al-4V Alloy via In-Grain Misorientation Axis Distribution

Sun

et al. 2022

Metals

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Selective laser-melted (SLM) Ti-6Al-4V alloy was quasi-statically compressed in the transverse and longitudinal directions at a strain rate of 1 × 10−3 s−1 at room temperature. The twinning, in-grain misorientation axis (IGMA) distribution and active slip modes of individual grains in the deformed SLM Ti-6Al-4V alloy were studied in detail via transmission Kikuchi diffraction (TKD) and transmission electron microscopy (TEM). The α’/α phase was textured with the c-axis oriented either at ~45° or perpendicular to the building direction (BD). A combined analysis of the IGMA distribution and Schmid factor revealed that the prismatic <a> slip or pyramidal slip was easily activated in the soft grains with their c-axes perpendicular to the BD (or the loading direction) in the longitudinal compressed sample, while slip was hardly activated in the transverse compressed sample due to the lack of soft grains. Prismatic <a> slip with IGMA around <0001> Taylor axis also occurred in {10–11} twins. The observations revealed that the prismatic <a> slip played a key role in accommodating the external strain and, thus, well explained the anisotropy of mechanical properties in the SLM Ti-6Al-4V alloy.

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“…The fatigue life prediction of titanium alloy can be divided into three main criteria: stress criteria [19,20], energy criteria [21][22][23] and strain criteria [24][25][26]. The stress criterion is suitable for the life prediction of High Cycle Fatigue (HCF).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Low Cycle Fatigue Behavior of Ti2AlNb Alloy Subcomponents

Wang¹,

Zhu²,

Sha³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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Many titanium alloy subcomponents are subjected to fatigue loading in aerospace engineering, resulting in fatigue failure. The fatigue behavior of Ti 2 AlNb alloy subcomponents was investigated based on the Seeger fatigue life theory and the improved Lemaitre damage evolution theory. Firstly, the finite element models of the standard openhole specimen and Y-section subcomponents have been established by ABAQUS. The damage model parameters were determined by fatigue tests, and the reliability of fatigue life simulation results of the Ti 2 AlNb alloy standard open-hole specimen was verified. Meanwhile, the fatigue life of Ti 2 AlNb alloy Y-section subcomponents was predicted. Under the same initial conditions, the average error of fatigue life predicted by two different models was 20.6%. Finally, the effects of loading amplitude, temperature, and Y-interface angle on fatigue properties of Ti 2 AlNb Y-section subcomponents were investigated. These results provide a new idea for evaluating the fatigue life of various Ti 2 AlNb alloy subcomponents.

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Microstructure and cyclic deformation behavior of a 3D-printed Ti–6Al–4V alloy

Cited by 25 publications

References 74 publications

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

Active Slip Mode Analysis of an Additively Manufactured Ti-6Al-4V Alloy via In-Grain Misorientation Axis Distribution

Numerical Simulation of Low Cycle Fatigue Behavior of Ti2AlNb Alloy Subcomponents

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