Effect of Heat-Treatment Conditions on the Microstructure and the Static Fracture Toughness of an α + β VT23 Titanium Alloy

被引：1
|
作者：
Gladkovskii, S. V. [1 ]
Veselova, V. E. [1 ]
Vichuzhanin, D. I. [1 ]
Zichenkov, M. Ch. [2 ]
Dubinskii, S. V. [2 ]
Kovalev, N. I. [2 ]
Kulemin, A. V. [2 ]
Kovalev, I. E. [2 ]
机构：
[1] Russian Acad Sci, Gorkunov Inst Engn Sci, Ural Branch, Ekaterinburg 620049, Russia
[2] Cent Aerohydrodynam Inst, Zhukovskii 140180, Moscow Oblast, Russia
来源：
RUSSIAN METALLURGY | 2023年 / 2023卷 / 04期
关键词：
two-phase titanium alloy; quenching; aging; metastable beta phase; martensitic transformation; mechanical properties; static fracture toughness; microstructure of fracture surface;
D O I：
10.1134/S0036029523040092
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The mechanical properties and microstructure of an alpha + beta VT23 titanium alloy are studied after quenching under various conditions and strengthening aging. Aging at 500 degrees C for 8 h is shown to decrease the static fracture toughness (SFT) of the alloy quenched from 800 or 860 degrees C by a factor of 1.4 and 2.4, respectively. The highest set of strength properties and static fracture toughness (sigma(0.2) = 1130 MPa, sigma(u) = 1252 MPa, K-1c = 39.2 MPa m(1/2)) at a retained sufficient structural strength reserve T = 44.4 x 10(3) MPa2 m(1/2) is achieved after quenching from 800 degrees C and subsequent aging at 500 degrees C for 8 h. The regularities of the evolution of the phase composition and the structure of the alloy as a function of heat-treatment conditions are found. The peculiarities of the macro- and microstructure of the fracture surfaces of compact ST specimens after static fracture toughness tests are revealed.
引用
收藏
页码：425 / 432
页数：8
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