氢脆机理模型(AIDE、HEDE、HESIV、HELP)和氢探测技术(TDS、HMT、SIMS、SKP、SKPFM、APT)
2024-10-14 14:20:57 作者:考拉腐蚀 来源:考拉腐蚀 分享至:

 

金属材料中氢脆HE的发生通常认为有三个阶段:

 

  1. the ingress of H atoms from the H-containing atmosphere, followed by its diffusion(even at room temperature) to stress-concentated fields and micro structural traps;
  2. the interacttion between H atoms and a vatiety of multi-demensional microstrcutural defects including vacancies, solute atoms, dislocations, interfaces and micro-voids/cracks;
  3. the promoted damage nucleation and evolution due to the H-defect interactions.

 

氢脆HE的几个模型(embrittlement models)有:

 

  • HEDE, H-enhanced decohesion;
  • HELP, H-enhanced localized plasticity;
  • HESIV, H-enhanced strain-induced vacancies;
  • AIDE, Adsorption-induced dislocation emmission;

 

常用的几种氢探测技术( microstructure-sensitive H probing techniques)有:

 

  • TDS, Thermal desorption spectrometry 热脱附光谱;
  • HMT, H microprint technique 氢微印技术;
  • SIMS, Secondary ion mass spectroscopy 二次离子质谱;
  • SKP, Scanning Kelvin probe 扫描开尔文探针;
  • SKPFM, Scanning Kelvin probe force microscopy 扫描开尔文探针力显微镜;
  • APT, Atom probe tomography 原子探针断层成像;
  • Netron radiography/tomography 中子射线断层成像;

 

 

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