000			01903nmc a2200253 4500
005			20260520005659.0
008			260224s xxu
082			_aCD W938 1 0013960
210			_aWPC (16th.)
245	0	0	_aTransgranular stress corrosion cracking (TGSCC) of high resistance pipeline steels
270			_a12/09/06 ; 26/08/2003
300			_a4 p.
520			_aResumen del autor, extraído del trabajo. Underground pipeline steels are mainly low alloy steels of the API specifications (for instance, X65 and X52), showing a ferritic-pearlitic structure with elongated inclusions, mainly MnS. These materials have been proved susceptible to Transgranular Stress Corrosion Cracking (TGSCC) in diluted solutions of near neutral pH. This cracking phenomenon has been firstly studied by Parkins[1, 2], as a consequence of field observations [3]. Cracking was mainly observed under disbonded region of the pipeline coating, where cathodic protection is not effective. Hydrogen embrittlement due to the diffusion of atomic hydrogen produced in the cathodic reaction at the crack tip has been identified as the active cracking mechanism [4, 2]). Testing methodologies for Environmental Assisted Cracking (EAC) usually follow the procedures of fracture mechanics standards, operating under displacement or strain control [5]. To reproduce cracking morphology observed in field, tests under load control have been performed and compared with Slow Strain Rate tests under displacement control[6].
773			_gv. 5, p. 157
942			_cCONGTP
100	1		_aDi Liberto, S. _910204
100	1		_aGabetta, G. _910205
110	2		_aEniTecnologie _99752
111	2		_aWorld Petroleum Congress (16th. : 2000 jun. 11-15 : Calgary, Alberta, Canada) _934
700	1		_aGabetta, G. _910205
710	2		_aEniTecnologie _99752
800	1		_aDi Liberto, S. _910204
999			_c133701 _d133701