ENVIRONMENTAL STRESS CRACKING OF POLYETHYLENE (I)

Environmental Stress Crack Resistance Of Polyethylene

Introduction to Environmental Stress Cracking and ESCR Over the past decade, high-density polyethylene (HDPE) materials have improved significantly and now meet more stringent performance standards; some performance evaluation tests that once took only days to run now take months with today’s resins. One such performance criteria is Environmental Stress Crack Resistance (ESCR). Because standard...

Stress Corrosion Cracking

Environmental stress cracking is involved with some 25 % of plastic part failures

Environmental stress cracking (ESC) is a phenomenon in which a plastic resin is degraded by a chemical agent while under stress, and it is the leading cause of plastic component failure. It is a solvent-induced failure mode, in which the synergistic effects of the chemical agent and mechanical stresses result in cracking. A recent study showed that 25% of plastic part failures are related to ES...

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...