2017-08-012024-05-15https://scholars.lib.ntu.edu.tw/handle/123456789/663478摘要：鋼鐵材料受到僅極微量的氫攻擊，便能夠使材料的性能大幅降低，稱為氫脆(Hydrogen Embrittlement, HE)，此外，鋼鐵的強度越強，對氫脆敏感度越高。當代先進超高強度鋼的開發仍甚少觸及其抗氫脆能力，因而限制其未來應用的空間與推廣的效率。 本研究計畫「超高強度鋼中氫陷阱與應力/應變競合關係之研究」可分為「超高強度鋼之氫陷阱熱脫行為研究」、「氫陷阱與應力場之脫氫競合行為研究」、與「半動態應變誘導相變化之脫氫行為研究」三大方向，核心技術於應力或應變控制條件下進行充氫以及脫氫實驗來研究氫陷阱的氫束縛與脫縛行為，透過熱脫氫譜研究其對氫之束縛能力與特性，並以先進電子顯微鏡分析氫陷阱特徵，進而用以抑制材料中氫的擴散，提出超高強度鋼抵抗氫脆之合金設計觀念與顯微結構控制原理。<br> Abstract: In steels, attacks by extremely low hydrogen contents could leads to great degradation in materials performance. This is well known as hydrogen embrittlement. The steels with higher strengths are more sensitive to attacks from hydrogen. However, the ability to resist hydrogen embrittlement has not been wisely considered in the contemporary developments of advanced ultrahigh-strength steels. This definitely restricts materials applications and the efficiency in implements in the future. The current proposal “Study on coopetitive relationships between hydrogen trapping and stress/strain in ultrahigh-strength steels” involves three directions:「Hydrogen thermal desorption in ultrahigh-strength steels」,「Coopetitive relationships between hydrogen trapping and stress」and 「Behavior of hydrogen desorption in phase transformation under conditions of semi-dynamic strain」. The key technology is to study hydrogen trapping and desorption via experiments, which charge hydrogen and desorb hydrogen under stress or strain. The performance of hydrogen trapping sites will be understood from hydrogen desorption spectrum. Moreover, the characteristics of hydrogen trapping sites will be investigated by using advanced electron microscopy. Hence, the current study will produce methods to suppress diffusion of hydrogen in steels, and will provides concepts of alloy design and principles of microstructural control for the hydrogen resistance in ultrahigh-strength steels.超高強度鋼氫脆應力應變ultrahigh-strength steelhydrogen embrittlementstressstrain學術研究生涯發展計畫－桂冠型研究計畫【超高強度鋼中氫陷阱與應力/應變競合關係之研究】