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Keywords: hydrogen embrittlement
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Proceedings Papers

Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A055, July 13–15, 2021
Paper No: PVP2021-62436
.... On the indicative of hydrogen embrittlement were observed on the other hand, internal hydrogen (material saturated with hydrogen fracture surfaces of hydrogen-precharged specimens, which is prior to testing in a process called precharging) ensures that consistent with the loss of ductility. hydrogen is present...
Proceedings Papers

Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A054, July 13–15, 2021
Paper No: PVP2021-62195
...Abstract Abstract A simple screening technique of hydrogen embrittlement (HE) of steels for hydrogen energy facilities using an in-situ small-punch (SP) test method under external hydrogen condition has been established. Using this method, we investigated the HE behaviors of API X70 steel welds...
Proceedings Papers

Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A050, July 13–15, 2021
Paper No: PVP2021-61821
.... Integrity management of the existing infrastructure requires a WCL Weld Center Line risk evaluation for the planned hydrogen introduction and the challenge of hydrogen embrittlement needs to be considered. HAZ Heat Affected Zone The aim of the current study was to evaluate the effect of blending different...
Proceedings Papers

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A021, July 13–15, 2021
Paper No: PVP2021-61954
... pressurization temperature (MPT) envelopes for these reactors, both temper and hydrogen embrittlement effects must be considered. However, there are no specific rules to evaluate loss of toughness due to hydrogen embrittlement in the design Codes / fitness-for-service Standards. Earlier, Japanese steel...
Proceedings Papers

Proc. ASME. PVP2021, Volume 3: Fluid Structure Interaction; High Pressure Technology, V003T05A001, July 13–15, 2021
Paper No: PVP2021-60453
... the mechanical properties and fatigue endurance were deeply investigated in recent years, the resistance of SLMed Inconel 718 to the Hydrogen Embrittlement (HE) requires further investigation. The present paper deals with the effects of the SLM process on reducing the strength and ductility of Inconel 718...
Proceedings Papers

Proc. ASME. PVP2020, Volume 5: High Pressure Technology, V005T05A004, August 3, 2020
Paper No: PVP2020-21534
...Abstract Abstract Exposure of metallic parts to cathodic protection (CP) in sea water leads to production and diffusion of atomic Hydrogen into the metal matrix. Absorption of atomic Hydrogen into the metal could lead to hydrogen embrittlement (HE). In order to study the influence of stresses...
Proceedings Papers

Proc. ASME. PVP2020, Volume 5: High Pressure Technology, V005T05A008, August 3, 2020
Paper No: PVP2020-21478
...Abstract Abstract AISI 8630 steel used in subsea applications is subject to hydrogen embrittlement from externally applied cathodic protection. In this work, susceptibility variation on three grades of 8630 steel of different yield strength (YS), 100 ksi, 110 ksi and 120 ksi, were evaluated...
Proceedings Papers

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A087, August 3, 2020
Paper No: PVP2020-21241
...Abstract Abstract Recently, a simple screening technique based on the quantitative evaluation of the hydrogen embrittlement (HE) sensitivity of the metallic materials using an in-situ small-punch (SP) test method was developed by the author group. The in-situ SP test can be easily carried out...
Proceedings Papers

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A083, August 3, 2020
Paper No: PVP2020-21021
...Abstract Abstract It has been reported that hydrogen accumulation along grain boundaries (GBs) is an important process in the hydrogen embrittlement (HE) in pure Ni. However, there are no quantitative studies that elucidate the behavior of hydrogen accumulation and its effect on HE...
Proceedings Papers

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A084, August 3, 2020
Paper No: PVP2020-21122
... and succeeded in predicting the FCG acceleration ratio observed on H1150. This model was also successfully applied to a low-alloy steel with a comparable UTS (1002 MPa) tested in gaseous hydrogen. hydrogen embrittlement precipitation hardened stainless steels fatigue life test fatigue crack growth...
Proceedings Papers

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A085, August 3, 2020
Paper No: PVP2020-21228
... on flow stress. In addition, the L485-MB pipeline steel presents a shear type fracture mode in high partial pressure of hydrogen, whereas a cup and cone type fracture were observed in air, NG and low partial pressure of hydrogen in NG (0.2 MPa H 2 ). hydrogen embrittlement low alloy steel H 2 -NG...
Proceedings Papers

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A105, August 3, 2020
Paper No: PVP2020-21524
... subsequently increased up to the specimen’s failure. In a previous work, it was indicated how to implement this technique for Small Punch testing of steels in hydrogen embrittlement scenarios, adapting the steps duration. This proposal allows to obtain a threshold load by using at least 3 specimens in a total...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6B: Materials and Fabrication, V06BT06A037, July 14–19, 2019
Paper No: PVP2019-93145
... under cathodic polarization in low pH aqueous environment is analyzed following the assumptions of the Theory of Critical Distances. This methodology has been successfully applied in fracture and fatigue analysis, but it has not been employed yet under stress corrosion cracking or hydrogen embrittlement...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6B: Materials and Fabrication, V06BT06A050, July 14–19, 2019
Paper No: PVP2019-93550
...APPLICATION OF THE INCREMENTAL STEP LOADING TECHNIQUE TO SMALL PUNCH TESTS IN HYDROGEN EMBRITTLEMENT B. Arroyo1, P. González, L. Andrea, J.A. Álvarez, R. Lacalle LADICIM, University of Cantabria Santander, Spain ABSTRACT In this work, the incremental step loading technique to measure hydrogen...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6B: Materials and Fabrication, V06BT06A027, July 14–19, 2019
Paper No: PVP2019-93260
...WET COATED THIN BARRIER FILMS TO PREVENT HYDROGEN EMBRITTLEMENT ON SUS304 STAINLESS STEEL Kazuyoshi Kawami1 Asahimekki Co. Ltd., Tottori, Japan Seiji Fukuyama4, AIST, Higashihiroshima, Japan Motonori Tamura7 The University of Electro-Communications, Tokyo, Japan Toshiyuki Tanaka9, TIIT, Tottori...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6B: Materials and Fabrication, V06BT06A028, July 14–19, 2019
Paper No: PVP2019-93395
... specimens tested in 100 MPa hydrogen gas seems to be different. Therefore, further investigations are required to clear this difference. Keywords: hydrogen embrittlement, SSRT test, fatigue life test, austenitic stainless steels. NOMENCLATURE Ys 0.2 offset yield strength, MPa Ts Tensile strength, MPa El...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6B: Materials and Fabrication, V06BT06A034, July 14–19, 2019
Paper No: PVP2019-93738
...Abstract Abstract In this study, a simple screening technique using an in-situ small-punch (SP) test and based on the hydrogen embrittlement (HE) sensitivity of austenitic stainless steels was developed for use in hydrogen energy facilities. To investigate the HE behaviors of metallic materials...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6B: Materials and Fabrication, V06BT06A030, July 14–19, 2019
Paper No: PVP2019-93477
... alloy compared to the pure Ni; (II) hydrogen transportation towards grain boundaries are required to cause the IG fracture in the Cu-Ni alloy. Keywords: hydrogen embrittlement, nickel, copper-nickel alloy, intergranular fracture, tensile tests 1. INTRODUCTION To achieve widespread acceptance of fuel...
Proceedings Papers

Proc. ASME. PVP2019, Volume 1: Codes and Standards, V001T01A042, July 14–19, 2019
Paper No: PVP2019-93447
... stress-intensity range of an actual pressure vessel. type 2 pressure vessel leak before break high-pressure hydrogen vessel hydrogen embrittlement cyclic test ASSESSMENT OF LEAK BEFORE BREAK OF A NEWLY DEVELOPED TYPE II PRESSURE VESSEL WITH HIGH-PRESSURE HYDROGEN GAS Hiroshi Okano JFE Steel...
Proceedings Papers

Proc. ASME. PVP2009, Volume 6: Materials and Fabrication, Parts A and B, 1159-1166, July 26–30, 2009
Paper No: PVP2009-77038
... is beneficial to blunting crack tips and reducing crack propagation, high hydrostatic test pressures approaching yield cause localized threshold strains in weldments and base materials that consequently increases the susceptibility to nascent hydrogen embrittlement at strain boundaries. This paper discusses...