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| 題 名 | 晶粒大小對209不銹鋼抗氫脆性能的影響研究=Effect of Grain Size on Hydrogen Embrittlement Resistance of 209 Stainless Steel for High-Pressure Hydrogen Applications |
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| 作 者 | 黃瞬穎; 關聖立; 林庭維; | 書刊名 | 防蝕工程 |
| 卷 期 | 39:2 2025.06[民114.06] |
| 頁 次 | 頁1-12 |
| 分類號 | 440.25 |
| 關鍵詞 | 209不銹鋼; 晶粒尺寸; 氫脆; 209 stainless steel; Grain size; Hydrogen embrittlement; |
| 語 文 | 中文(Chinese) |
| DOI | 10.6376/JCCE.202506_39(2).0001 |
| 中文摘要 | 氫將成為未來主要發展的能源選擇。氫作為核心能源的應用也正在加速。因應加氫設施需要的高壓氫氣儲存設備,目前高壓管材多採用低強度不銹鋼(如SUS316、SUS316L),在擴大輸送需求和確保安全性方面存在不足。因此,需要開發高強度、抗氫脆性能優異的材料。本研究探討了利用209不銹鋼開發氫能領域使用的可行性,著重在晶粒大小對氫脆性能的影響。透過冷抽與退火得到小晶粒(13.42 μm)、中晶粒(20.66 μm)和大晶粒(83.15 μm)三種晶粒尺寸的209不銹鋼樣品,再利用電化學方式充氫72小時,後續進行慢速應變速率拉伸試驗(SSRT)。結果表明,除了大晶粒的強度由於晶粒粗大導致強度顯著下降之外,三種晶粒尺寸在充氫後對於機械性能的影響不大。破斷面分析顯示,雖然觀察到了某些氫脆機制導致的裂紋和破斷特徵,但對材料整體機械性質的影響不大,特別是在小晶粒材料中顯示出最佳的性能表現。 |
| 英文摘要 | In addition to electricity and heat, hydrogen is poised to become a major energy choice for the future. The application of hydrogen as a core energy source is also accelerating. Since the introduction of electric vehicles in Japan in 2014, the construction of hydrogen refueling stations has begun to meet the demand for hydrogen supply. Given the high-pressure hydrogen storage equipment required for these refueling facilities, current high-pressure piping materials often use low-strength stainless steels (such as SUS316 and SUS316L). There are shortcomings in expanding transportation demand and ensuring safety. Therefore, there is a need to develop materials with high strength and excellent resistance to hydrogen embrittlement. This study explores the feasibility of using 209 stainless steel in the hydrogen energy sector, focusing on the influence of grain size on hydrogen embrittlement. Samples of 209 stainless steel with small grains (13.42 μm), medium grains (20.66 μm), and large grains (83.15 μm) were obtained through cold drawing and annealing. These samples were then hydrogen charged via electrochemical methods for 72 hours, followed by slow strain rate tensile testing (SSRT). The results show that, apart from a significant strength reduction in the large-grain sample due to coarse grains, the grain size has minimal effect on mechanical properties after hydrogen charging. Fracture surface analysis reveals crack and fracture characteristics attributable to certain hydrogen embrittlement mechanisms, but these have minimal impact on the overall mechanical properties of the material, particularly demonstrating optimal performance in the small-grain material. Experimental findings indicate that 209 stainless steel exhibits good resistance to hydrogen embrittlement, making it suitable for the development of piping materials for use in high-pressure hydrogen environments. |
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