Determination of the thermophysical properties of liquid and solid Ti–6Al–4V alloy

Zhou, K.; Wei, B.

doi:10.1007/s00339-016-9783-6

Cited by 24 publications

(3 citation statements)

References 25 publications

(53 reference statements)

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“…The HAZ size was determined by the thermal diffusivity of each material. The thermal diffusivity of the Inconel 718 was higher than that of the Ti-6Al-4V, and the HAZ was smaller in the Inconel 718 [ 46 , 47 ]. The HAZ depths of the Ti-6Al-4V and Inconel 718 were reduced by 16.07% and 14.42%, respectively, according to the Ti-Nb-Cr-V-Ni-Al deposition.…”

Section: Resultsmentioning

confidence: 99%

Manufacturing of Ti-Nb-Cr-V-Ni-Al Refractory High-Entropy Alloys Using Direct Energy Deposition

2022

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High-entropy alloys (HEAs) are composed of 5–35 at% of five or more elements, have high configurational entropy, do not form intermetallic compounds, and have a single-phase face-centered cubic structure or body-centered cubic structure. In particular, refractory HEAs (RHEAs), based on refractory materials with excellent mechanical properties at high temperatures, have high strength and hardness at room temperature and excellent mechanical properties at low and high temperatures. In this study, the Ti-Nb-Cr-V-Ni-Al RHEAs were deposited using direct energy deposition (DED). In the microstructure of Ti-Nb-Cr-V-Ni-Al, the sigma, BCC A2, and Ti2Ni phases appeared to be different from the BCC A2, BCC B2, and Laves phases predicted in the phase diagram. This microstructure was similar to that of the casted Ti-Nb-Cr-V-Ni-Al and had a constructed fine grain size. It was found that the growth of these microstructures was due to the DED process, which has a fast solidification rate. The fine grain size caused high hardness, and the microhardness of the Ti-Nb-Cr-V-Ni-Al was measured to be about 900 HV. In addition, in order to analyze the thermal properties of Ti-Nb-Cr-V-Ni-Al composed of the refractory material, the heat-affected zone (HAZ) was analyzed through a preheating test. The HAZ was decreased, owing to the high thermal diffusivity of Ti-Nb-Cr-V-Ni-Al.

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Section: Resultsmentioning

confidence: 99%

Manufacturing of Ti-Nb-Cr-V-Ni-Al Refractory High-Entropy Alloys Using Direct Energy Deposition

2022

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“…Only thermal undercooling is considered in the present work [28]. Based on this assumption, the dendritic growth velocity equation is assumed as a power function of thermal undercooling [45]. The nucleated grains are assigned a crystallographic orientation q at random.…”

Section: Solidification Modelmentioning

confidence: 99%

Uncertainty quantification of grain morphology in laser direct metal deposition

Nath

Mahadevan

2019

Modelling Simul. Mater. Sci. Eng.

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Uncertainty quantification (UQ) has an important role to play in the quality control of additively manufactured products. With a focus on laser direct metal deposition (LDMD), this work presents a systematic UQ framework to quantify the uncertainty of grain morphology due to various sources of uncertainty in the LDMD simulation process. The LDMD process is simulated by a coupled analysis consisting of a macroscale finite element model for the melt pool and a microscale cellular automata model for solidification to predict the microstructure. UQ is carried out using singular value decomposition-based Kriging surrogate of the expensive simulation model. The effectiveness of the proposed approach is demonstrated by identifying several major sources of uncertainty and studying their contributions to the uncertainty in the grain size distribution using a variance-based sensitivity analysis method.

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“…For example, Dhupal et al 7 investigated the relationship between processing parameters of pulsed Nd:YAG laser-turning operation in the production of microgrooves on cylindrical ceramic workpieces, coarse-grained diamond grinding wheels were microstructured with a UV nanosecond-pulsed laser proposed by Guo et al, 8 and Walter et al 9 introduced surface microstructuring using a picosecond pulsed laser ablation method to inuence the grinding behavior of high-strength bonded CBN grinding wheels. Additionally, with respect to metal and alloy materials, Zhou et al 10,11 measured the thermal diffusivity of solid titanium and Ti-6Al-4V alloy in the solid state using a laser ash method.…”

Section: Introductionmentioning

confidence: 99%

Influence of laser nanostructured diamond tools on the cutting behavior of silicon by molecular dynamics simulation

Dai

Chen

et al. 2017

RSC Adv.

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Determination of the thermophysical properties of liquid and solid Ti–6Al–4V alloy

Cited by 24 publications

References 25 publications

Manufacturing of Ti-Nb-Cr-V-Ni-Al Refractory High-Entropy Alloys Using Direct Energy Deposition

Manufacturing of Ti-Nb-Cr-V-Ni-Al Refractory High-Entropy Alloys Using Direct Energy Deposition

Uncertainty quantification of grain morphology in laser direct metal deposition

Influence of laser nanostructured diamond tools on the cutting behavior of silicon by molecular dynamics simulation

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