There is no previous definition.
The principle of the continuous-flow conveyor is that when a surface is pulled transversely through a mass of granular, powdered, or smalllump material, it will pull along with it a cross section of material
which is greater than the area of the surface itself. The conveying action of various designs of continuous-flow conveyors varies with the
type of conveying flight but theoretically is not comparable with the action in a flight or drag conveyor. Flights vary from solid surfaces to
skeleton designs, as shown in Fig. 21-9.
The continuous-flow conveyor is a totally enclosed unit which has a relatively high capacity per unit of cross-sectional area and can follow
an irregular path in a single plane. These features make it extremely versatile. Figure 21-10 shows some typical arrangements and applications possible with these conveyors. Included is an example of the unit
acting as a dewatering device (Fig. 21-10c).
(J. Raymus, Handling of Bulk Solids and Packaging of Solids and Liquids, p.21-17)
5) Hydrogen Embrittlement (Material)
There is no previos definition.
Hydrogen embrittlement of structural steels is known to cause early failure at lower loads and shorter times than without exposure to hydrogen, effects that were first observed almost 130 years ago. The potential result of this phenomenon is catastrophic failure with loss of property and life. Consequently, much effort and many publications (greater than 3000) have been devoted to characterizing and defining the driving forces, the metallurgical factors affecting embrittlement, and to understanding the mechanisms of embrittlement. The source of hydrogen (determining fugacity and location), the temperature and temperature history, and the duration of hydrogen exposure define the potential severity of hydrogen embrittlement. Metallurgical and mechanical factors then determine the response of the structure to the environment. (We will not consider hydrogen attack, a characteristic of high temperature service conditions.) Austenitic stainless steels are commonly more compatible with hydrogen-bearing environments than ferritic alloys, and the austenitic stainless steels are often specified for hydrogen service when their enhanced compatibility, safety, and reliability override their expense. In this paper we will focus on the austenitic stainless steels, including nitrogen-strengthened variants, dealing first with the phenomenology of hydrogen embrittlement, and correlations with metallurgical factors.
(S.L. Robinson et al. , HYDROGEN EMBRITTLEMENT OF STAINLESS STEELS, p.1)
5) Hydrogen Embrittlement (Material)
There is no previos definition.
Hydrogen embrittlement of structural steels is known to cause early failure at lower loads and shorter times than without exposure to hydrogen, effects that were first observed almost 130 years ago. The potential result of this phenomenon is catastrophic failure with loss of property and life. Consequently, much effort and many publications (greater than 3000) have been devoted to characterizing and defining the driving forces, the metallurgical factors affecting embrittlement, and to understanding the mechanisms of embrittlement. The source of hydrogen (determining fugacity and location), the temperature and temperature history, and the duration of hydrogen exposure define the potential severity of hydrogen embrittlement. Metallurgical and mechanical factors then determine the response of the structure to the environment. (We will not consider hydrogen attack, a characteristic of high temperature service conditions.) Austenitic stainless steels are commonly more compatible with hydrogen-bearing environments than ferritic alloys, and the austenitic stainless steels are often specified for hydrogen service when their enhanced compatibility, safety, and reliability override their expense. In this paper we will focus on the austenitic stainless steels, including nitrogen-strengthened variants, dealing first with the phenomenology of hydrogen embrittlement, and correlations with metallurgical factors.
(S.L. Robinson et al. , HYDROGEN EMBRITTLEMENT OF STAINLESS STEELS, p.1)
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