Effect of long term exposure and hydrogen effects on HSSCC behaviour of titanium alloy IMI 834

被引：14

作者：

Pustode, Mangesh D. ^{[1
]}

Raja, V. S. ^{[1
]}

Dewangan, Bhupendra ^{[1
]}

Paulose, Neeta ^{[2
]}

机构：

[1] Indian Inst Technol, Dept Met Engn & Mat Sci, Bombay 400076, Maharashtra, India

[2] Gas Turbine Res Estab, Bangalore 560093, Karnataka, India

来源：

MATERIALS & DESIGN | 2015年 / 86卷

关键词：

Titanium alloy; Stress corrosion cracking; Hydrogen embrittlement; Scanning electron microscope; X-ray diffraction; SALT STRESS-CORROSION; HOT-SALT; ASSISTED CRACKING; ALUMINUM ALLOYS; FATIGUE; SLIP; SUSCEPTIBILITY; EMBRITTLEMENT; ENVIRONMENT; RESISTANCE;

D O I：

10.1016/j.matdes.2015.08.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hot salt stress corrosion cracking (HSSCC) behaviour of alloy IMI 834 was studied to examine the effect of long-term exposure and the role of hydrogen. Studies were conducted by exposing the salt-coated specimens at 300, 350 and 400 degrees C, at different stress levels for 1000 h, and in the unstressed condition; and the role of hydrogen in HSSCC was studied by using X-ray diffraction. Although the specimens passed 1000 h of hot salt exposure test at stress levels higher than their yield strength, at these temperatures, the post-exposure tensile tests showed a significant loss in ductility and the presence of micro cracks. The study shows the presence of hydrides, which are responsible for HSSCC (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：841 / 847

页数：7

共 42 条

[1]

[Anonymous], 1988, KEY ENG MAT

[2]

ASTM, 2009, E8 ASTM

[3] Electron back scattered diffraction (EBSD) analysis of quasi-cleavage and hydrogen induced fractures under cyclic and dwell loading in titanium alloys [J].

Bache, MR ;

Evans, WJ ;

Davies, HM .

JOURNAL OF MATERIALS SCIENCE, 1997, 32 (13) :3435-3442

[4]

Boyd W.K., 1964, D5000 NASA TN

[5] Slip and fatigue crack formation processes in an α/β titanium alloy in relation to crystallographic texture on different scales [J].

Bridier, F. ;

Villechaise, P. ;

Mendez, J. .

ACTA MATERIALIA, 2008, 56 (15) :3951-3962

[6] Analysis of the different slip systems activated by tension in a α/β titanium alloy in relation with local crystallographic orientation [J].

Bridier, F ;

Villechaise, P ;

Mendez, J .

ACTA MATERIALIA, 2005, 53 (03) :555-567

[7] Hot salt stress corrosion cracking and corrosion fatigue of titanium alloys [J].

Cash, M ;

Nicholls, JR .

HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 4, PTS 1 AND 2, 1997, 251-2 :649-656

[8]

Chevrot T., 1994, THESIS CRANFIELD U

[9] Hydrogen diffusion coefficients in the titanium alloys IMI 834, Ti 10-2-3, Ti21S, and alloy C [J].

Christ, HJ ;

Decker, M ;

Zeitler, S .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2000, 31 (06) :1507-1517

[10] Hot salt stress corrosion resistance of Ti 6246 alloy [J].

Encrenaz, M ;

Faure, P ;

Petit, JA .

CORROSION SCIENCE, 1998, 40 (06) :939-950

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