成果報告書詳細
管理番号20160000000206
タイトル*平成27年度中間年報 水素利用技術研究開発事業 燃料電池自動車及び水素供給インフラの国内規制適正化、国際基準調和・国際標準化に関する研究開発 燃料電池自動車及び水素ステーション関連機器向け使用可能鋼材の拡大に関する研究開発(5)
公開日2016/9/2
報告書年度2015 - 2015
委託先名国立研究開発法人物質 ・材料研究機構
プロジェクト番号P13002
部署名新エネルギー部
和文要約
英文要約Research and Development on Hydrogen Utilization Technology
Research and Development on the Adjustment of Domestic Regulations, International Standard Harmonization and International Standardization for Fuel Cell Vehicles and Hydrogen Supply Infrastructure
Research and Development on the Expansion of Utilizable Steel for Fuel Cell Vehicles and Hydrogen Stations
Subject 2ー3 Research on Material Properties under Cryogenic to Higher Temperatures and Gas Environment
(FY2013-FY2017)FY2015Annual Report

Using a simple testing method for mechanical properties in high-pressure hydrogen gas environments, the effects of hydrogen environment embrittlement (HEE) on tensile properties of the STH2 at 70 MPa at room temperature to 190 K were evaluated. The crosshead-speed during tensile test was 3.6 mm/h. The effect of HEE is evaluated by the ratio of reduction of area (relative reduction of area) obtained in tensile tests using the specimen filled in hydrogen gas to that obtained in helium gas. The relative reduction of area (RRA) of the STH2 was 0.81 even at 190 K, so there is small effect of HEE for STH2, even at low temperatures. For SUS630, in order to understand the HEE, 70 MPa hydrogen was removed and changed to air during tensile testing at 230 K at the stress level of 92 % of fractured stress in 70 MPa hydrogen. After the exchange, there was almost no effect of hydrogen was observed, which means that the effect of hydrogen comes out higher than a certain stress. Increasing pressure of hydrogen tests were carried out at stress level of 900 MPa for 300 K and at stress level of 700 MPa for 230 K. At 300 K, the specimen was failed at 48 MPa H2 and at 230 K the specimen was failed at 50 MPa H2. From above results, it was concluded that the HEE occurs at the conditions which materials is loaded to at a certain stress level and hydrogen gas pressure increases to at a certain pressure level. In these conditions, the hydrogen invades into materials and accelerates the movements of dislocations to fracture.
ダウンロード成果報告書データベース(ユーザ登録必須)から、ダウンロードしてください。

▲トップに戻る