The microstructural evolution and grain growth kinetics of TZ20 alloy during isothermal annealing

Liang, S.X.; Yin, L.X.; Zheng, Liaoying; Ma, Mingzhen; Liu, R.P.

doi:10.1016/j.matdes.2016.03.065

Cited by 14 publications

(2 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in figure 4(b), the growth rate gradually became rapid and the grain size increased obviously with an increase in temperature. Grain-growth is a diffusion-controlled thermal activation process that driven by grain-boundary energy [23]. With an extended treatment time, the increase of grain size reduces the total grain boundary area, and the migration velocity of the grain boundary decreases.…”

Section: Resultsmentioning

confidence: 99%

Effects of β grain-growth behaviors on lamellar structural evolution and mechanical properties of TC4–DT alloy

Dong

Cai

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

Grain-growth behaviors of TC4-DT alloy in a narrow temperature range (990°C−1050°C) were systematically investigated, and the effects of which on the lamellar structural evolution and mechanical properties were quantitatively evaluated. Microstructural observations indicated that prior β grain size increased with an increase in heat-treatment temperature and time, which was described by the modified Sellars model. The grain-growth exponent (n=2.741) and activation energy (Q=161.0 kJ mol −1 ) during β treatment were confirmed. The α colony size similar to β grain varied significantly with the heat-treatment conditions, while α plate thickness changed slightly. The Hall-Petch equation could qualitatively exhibit the relationships between the lamellar microstructure parameters (prior β grain size, α colony size, and α plate thickness) and mechanical properties (strength, ductility, and impact toughness). The fine prior β grain that contained different orientated α colonies produced more boundaries to hinder dislocation motion and crack propagation, which contributed a more circuitous crack growth path. The results indicated that the control of α colony size was critical to improve the mechanical performance of TC4-DT alloy.

show abstract

Section: Resultsmentioning

confidence: 99%

Effects of β grain-growth behaviors on lamellar structural evolution and mechanical properties of TC4–DT alloy

Dong

Cai

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…Ti-20Zr-6.5Al-4V (wt-%) is one kind of recently developed TiZr-based alloy with a good application perspective in the aerospace and chemical industry due to its high specific strength, radiation resistance and better corrosion resistance than conventional stainless steels. Up to now, there have been lots of researches which focus on the microstructural optimisation, service performances, as well as the relationship between microstructure and properties [20][21][22][23]. In a previous study about the high cycle fatigue (HCF) properties [24], it has been found that the equiaxed microstructure presents superior lifetime to the lamellar one at high stress level, but the former exhibits lower fatigue strength than the latter.…”

Section: Introductionmentioning

confidence: 99%

Investigation on fatigue crack propagation behaviour of novel TiZr-based alloy

Yue

et al. 2021

Materials Science and Technology

View full text Add to dashboard Cite

Fatigue crack propagation behaviour of a novel TiZr-based alloy with two different microstructures was studied at room temperature. The measurements at increasing stress intensity factor range were conducted with loading ratios of 0.1 and 0.6. Based on the measurements, it is found that the alloy with the lamellar microstructure shows fatigue striations and secondary cracks. As to the equiaxed microstructure, many facets are generated instead of striations. Compared with the two cases, the alloy with the lamellar structure exhibits a better resistance to fatigue crack propagation, and the resistance increases with a decrease of stress ratio for both microstructures. Combined with electron backscatter diffraction analysis, the lower crack propagation rate of the lamellar microstructure can be ascribed to crack bifurcation and striation growth.

show abstract

Effects of Solution Treatment on the Microstructure and Mechanical Properties of Ti–22Al–25Nb Alloys

Kou

Tang

et al. 2017

Adv Eng Mater

View full text Add to dashboard Cite

The effects of solution treatment on the microstructure and mechanical properties of Ti-22Al-25Nb alloy are investigated. Numerous equiaxed a 2 particles distribute in a B2 matrix after solution treatment in the a 2 þ B2 region. The growth rate of the B2 grain increases with solution temperature and decreases with increasing holding time. When the solution temperature is lower than B2-transus, it is seen that both the strength and ductility decrease with increasing solution temperature and holding time. After being solution-treated at a super-transus temperature, the alloy with a fully B2 microstructure shows an ultralow elongation ($5%) and a typical brittle fracture characteristic.

show abstract

The microstructural evolution and grain growth kinetics of TZ20 alloy during isothermal annealing

Cited by 14 publications

References 39 publications

Effects of β grain-growth behaviors on lamellar structural evolution and mechanical properties of TC4–DT alloy

Effects of β grain-growth behaviors on lamellar structural evolution and mechanical properties of TC4–DT alloy

Investigation on fatigue crack propagation behaviour of novel TiZr-based alloy

Effects of Solution Treatment on the Microstructure and Mechanical Properties of Ti–22Al–25Nb Alloys

Contact Info

Product

Resources

About