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

页码：425 / 432

页数：8

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