Stress-Cracking of Acetal Copolymer

Stress Corrosion Cracking

ARPA Coupling Program on Stress - Corrosion Cracking

A progress report of the ret arch invest carried out on the problem of stress-cor high strength materials under ARPA Order Work at Carnegie-Mellon University, Lehi Georgia Institute of Technology, The Boe American University, and the Naval Resea cerning test techniques, materials chara metallurgy, surface studies, and corrosi described. The report is divided into t covering work on high strengt...

Acoustic Emission during Stress Corrosion Cracking Test

AE monitoring from various types of stress corrosion cracking (SCC) has been conducted for the past 15 years in our laboratory. This paper discusses AE results of active-path dissolution-type SCC of austenitic stainless steel in chloride solution and fused salt, fluoride and polythionic acid solutions, brass in ammonia (Mattosson's solution), and carbon steels in nitrite solution. Transgranular...

Corrosion Product Film-Induced Stress Facilitates Stress Corrosion Cracking

Finite element analyses were conducted to clarify the role of corrosion product films (CPFs) in stress corrosion cracking (SCC). Flat and U-shaped edge-notched specimens were investigated in terms of the CPF-induced stress in the metallic substrate and the stress in the CPF. For a U-shaped edge-notched specimen, the stress field in front of the notch tip is affected by the Young's modulus of th...

Erythromycin A 11,12-methylene acetal.

Erythromycin A 11,12-methylene acetal (5) and the corresponding 9-methoxime, 9-dihydro, and 8-hydroxy derivatives have been prepared and their antibacterial activities compared with those of erythromycin A and its 11,12-cyclic carbonate. The simple methylene acetal 5 showed excellent activity against Gram-positive organisms in vitro.