Hot salt stress corrosion cracking by silver chloride in Ti-6Al-2Sn-4Zr-6Mo

Hot salt stress corrosion cracking by silver chloride in Ti-6Al-2Sn-4Zr-6Mo

Hot salt stress-corrosion cracking (HSSCC) of titanium alloys has been found in the presence of chloride and other halide salts. Here, a series of AgCl HSSCC tests on Ti-6246 were conducted using a two-point bending rig at 380-500°C to determine the boundary conditions of stress and temperature. Rap...

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Main Authors: Shi Yitong, Joseph Sudha, Lindley Trevor, Sandala Rebecca, Saunders Edward, Dye David
Format: Article
Language:English
Published: EDP Sciences 2020-01-01
Series:MATEC Web of Conferences
Online Access:https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_04025.pdf
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spelling doaj-2ac16a3c2bb14303b8524674b10dd9722021-08-11T12:57:53ZengEDP SciencesMATEC Web of Conferences2261-236X2020-01-013210402510.1051/matecconf/202032104025matecconf_ti2019_04025Hot salt stress corrosion cracking by silver chloride in Ti-6Al-2Sn-4Zr-6MoShi Yitong0Joseph Sudha1Lindley Trevor2Sandala Rebecca3Saunders Edward4Dye David5Department of Materials, Imperial College London,Department of Materials, Imperial College London,Department of Materials, Imperial College London,Rolls-Royce plc., MaterialsRolls-Royce plc., Materials-Failure InvestigationDepartment of Materials, Imperial College London,Hot salt stress-corrosion cracking (HSSCC) of titanium alloys has been found in the presence of chloride and other halide salts. Here, a series of AgCl HSSCC tests on Ti-6246 were conducted using a two-point bending rig at 380-500°C to determine the boundary conditions of stress and temperature. Rapid failure occurred after 24 hours above 440 °C, whilst the trigger stress of HSSCC was determined to be 400 MPa at 380 °C. Energy dispersive X-ray during scanning transmission electron microscopy (STEM-EDX) suggested the formation of metallic silver and chlorides of active alloying elements Al, Sn and Zr. The transgranular fracture surface is expected to be linked to an underlying hydrogen embrittlement via hydrogen charging from the corrosion reactions.https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_04025.pdf
collection DOAJ
language English
format Article
sources DOAJ
author Shi Yitong
Joseph Sudha
Lindley Trevor
Sandala Rebecca
Saunders Edward
Dye David
spellingShingle Shi Yitong
Joseph Sudha
Lindley Trevor
Sandala Rebecca
Saunders Edward
Dye David
Hot salt stress corrosion cracking by silver chloride in Ti-6Al-2Sn-4Zr-6Mo
MATEC Web of Conferences
author_facet Shi Yitong
Joseph Sudha
Lindley Trevor
Sandala Rebecca
Saunders Edward
Dye David
author_sort Shi Yitong
title Hot salt stress corrosion cracking by silver chloride in Ti-6Al-2Sn-4Zr-6Mo
title_short Hot salt stress corrosion cracking by silver chloride in Ti-6Al-2Sn-4Zr-6Mo
title_full Hot salt stress corrosion cracking by silver chloride in Ti-6Al-2Sn-4Zr-6Mo
title_fullStr Hot salt stress corrosion cracking by silver chloride in Ti-6Al-2Sn-4Zr-6Mo
title_full_unstemmed Hot salt stress corrosion cracking by silver chloride in Ti-6Al-2Sn-4Zr-6Mo
title_sort hot salt stress corrosion cracking by silver chloride in ti-6al-2sn-4zr-6mo
publisher EDP Sciences
series MATEC Web of Conferences
issn 2261-236X
publishDate 2020-01-01
description Hot salt stress-corrosion cracking (HSSCC) of titanium alloys has been found in the presence of chloride and other halide salts. Here, a series of AgCl HSSCC tests on Ti-6246 were conducted using a two-point bending rig at 380-500°C to determine the boundary conditions of stress and temperature. Rapid failure occurred after 24 hours above 440 °C, whilst the trigger stress of HSSCC was determined to be 400 MPa at 380 °C. Energy dispersive X-ray during scanning transmission electron microscopy (STEM-EDX) suggested the formation of metallic silver and chlorides of active alloying elements Al, Sn and Zr. The transgranular fracture surface is expected to be linked to an underlying hydrogen embrittlement via hydrogen charging from the corrosion reactions.
url https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_04025.pdf
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AT sandalarebecca hotsaltstresscorrosioncrackingbysilverchlorideinti6al2sn4zr6mo
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