by National Aeronautics and Space Administration, Langley Research Center, National Technical Information Service, distributor in Hampton, Va, [Springfield, Va .
Written in English
|Statement||J.C. Newman, Jr. ... [et al.]|
|Series||NASA reference publication -- 1309|
|Contributions||Newman, J. C, Langley Research Center|
|The Physical Object|
Abstract: This chapter describes the industrial production of primary aluminium in Hall-Héroult electrolysis cells, where alumina (Al 2 O 3) is dissolved in a molten fluoride-containing electrolyte consisting mainly of cryolite (Na 3 AlF 6) at about ° chapter then discusses health, environment and safety (HES), and workers’ health and safety are now an integrated part of the. The program objectives were to identify and characterize crack initiation and growth of small cracks (10 microns to 2 mm long) in commonly used US and PRC aluminum alloys, to improve fracture. In addition to the small crack growth effects, FCG response of aluminum alloys can also be significantly affected by the presence of bulk residual stresses introduced during manufacturing and post-manufacturing processes such as heat treatment. There is a qualitative understanding of the effects of residual stress on the FCG behavior, but the effects need to be comprehensively quantified and. J. C. Newman has written: 'Prediction of fatigue-crack growth in a high-strength aluminum alloy under variable-amplitude loading' -- subject(s): Aluminum alloys, Fatigue 'An evaluation of the.
Small-crack effects in high-strength aluminum alloys [microform]: a NASA/CAE cooperative program / J.C. Constant amplitude and post-overload fatigue crack growth behavior in PM aluminum alloy AA [microfo Aluminum alloy [microform]: patent application. Small-crack effects in high-strength aluminum alloys [microform]: a NASA/CAE cooperative program  Hampton, Va.: National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va.: National Technical Information Service, distributor, ]. Prediction of Fatigue Crack Growth After Single Overload in an Aluminum Alloy. 38 Annual Book of ASTM Standards, Crack Effects in High-Strength Aluminum Alloys, ” NASA/CAE Coopera-. Some modifications to the ΔK eff-rate relations were needed in the near-threshold regime to fit small-crack growth rate behavior and endurance limits. The model was then used to calculate small- and large-crack growth rates, and to predict total fatigue lives, for notched specimens made of several aluminum alloys and a titanium alloy under Cited by:
Small-crack effects in high-strength aluminum alloys [microform]: a NASA/CAE cooperative program / J.C. Constant amplitude and post-overload fatigue crack growth behavior in PM aluminum alloy AA [microfo Aluminum alloy [microform]: patent application; Aluminium alloys for naval use. Newman, J.C.,Jr., “A Crack Closure Model for Predicting Fatigue Crack Growth under Aircraft Spectrum Loading,” Methods and Models for Predicting Fatigue Crack File Size: KB. machining". Free-machining alloys are not intended for use where welding is required. Phosphorus - is generally considered to be an undesirable impurity in steels. It is normally found in amounts up to % in most carbon steels. In hardened steels, it may tend to cause embrittlement. In low-alloy high-strength steels, phosphorus may be added. The aluminum alloy is used in many aerospace structural applications. Previous studies have identified that fatigue cracks develop very rough crack-surface profiles, which cause very high crack-closure levels due to a combination of plasticity, roughness and by: 9.