The liner of a carbon fiber fully reinforced composite tank with thermoplastic (type IV) works in hydrogen environment varying temperature and pressure profiles. ageing performance the may affect permeability consequent storage capacity, degrade mechanical properties, even increase leakage risks type IV tanks. In this paper, both testing procedures evaluation parameters an test required several...

the 17-4ph alloy is a martensitic stainless steel with 3–5 wt% cu, strengthened by the precipitation hardening. due to excellent mechanical properties, corrosion resistance and ease of heat treatment, this alloy has unique applications in nuclear power plants and marine constructions. in this paper, the influence of ageing heat treatment, solution annealing followed by ageing at 480, 550 and 62...

Textbooks and policy documents tend to present the boundary between normal and abnormal ageing as natural and clearly demarcated. In this study, we trouble the notion of natural and clearly demarcated boundaries between normal and abnormal ageing by considering how these boundaries have been established and maintained in present-day Western contexts. We draw on both Canguilhem's discussion of t...

OBJECTIVE to identify perceptions of, and associations with, active ageing among ethnically diverse and homogeneous samples of older people in Britain. DESIGN AND SETTING cross-sectional and longitudinal surveys of older people living at home in Britain. MEASURES active ageing, health, psych-social, socio-economic circumstances, and indicators of quality of life. RESULTS respondents defin...

With the purpose of understanding a well-documented RPC ageing phenomenon, consisting of a gradual increase of the plate resistivity for chambers working at high rate, we carried out a systematic study on the electrical conduction properties of phenolic–melaminic electrode plates. A number of small size sample plates were kept under intense electrical current at fixed voltage, to simulate a hig...