seawater subcritical cracking of hy steel weldments

'Weld Cracking In Ferrous Alloys' Will Be A Valuable seawater subcritical cracking of hy steel weldments

Oct 14, 2008 · Cracking mechanisms in stainless steel welds. Preventing weld cracking. References. Appendix of terms. Robust welding technologies for ferrous alloys A seawater subcritical cracking of hy steel weldments seawater subcritical cracking of hy steel weldmentsseawater subcritical cracking of hy steel weldments. Mobile evaporator corrosion test results (Technical Report . Localized corrosion resistance of stainless steel (Type 316L), a titanium based alloy (Ti 0.15Pd) and corrosion resistant nickel based alloys (a new alloy MAT 21 (Alloy T) and Alloy C 276) was evaluated in four simulated seawater seawater subcritical cracking of hy steel weldments

Effect of seawater on the fatigue life and crack growth seawater subcritical cracking of hy steel weldments

Sep 01, 1992 · The Q1N steel is identical to the HY-80 steel in terms of composition and strength, and the BIS 812 EMA steel is of higher strength than the Q1N steel. The seawater crack growth rate data obtained for BIS 812 EMA steel in this study falls within or close to the crack growth rate band obtained for Q1N steel under approximately similar test seawater subcritical cracking of hy steel weldmentsCrack Closure Effects on Fatigue Crack Growth Thresholds seawater subcritical cracking of hy steel weldmentsThe effects of crack closure on the near-threshold corrosion fatigue crack growth behavior of Mil S-24645 HSLA steel and its weld metal have been investigated in air, ASTM seawater at the free corrosion potential, and ASTM seawater at 0.8V and 1.0V (SCE) using frequencies of 10, 2, and 0.2 Hz, and a stress ratio, R = 0.1.Crack Closure Effects on Fatigue Crack Growth Thresholds seawater subcritical cracking of hy steel weldmentsThe effects of crack closure on the near-threshold corrosion fatigue crack growth behavior of Mil S-24645 HSLA steel and its weld metal have been investigated in air, ASTM seawater at the free corrosion potential, and ASTM seawater at 0.8V and 1.0V (SCE) using frequencies of 10, 2, and 0.2 Hz, and a stress ratio, R = 0.1.

STEEL NELDMENTS BY TRANSMISSION ELECTRON

HY-80 Steel SMA weldment and a non preheated (320 F--0° C) HY-80 steel SMA weldment. At present the welding procedure for HY-80 requires a 2500 F (1200 C) preheat for several reasons which include a reduction in the cooling rate follow-ing welding which allows more autotempering of the martensiteA Review of Fatigue Crack Growth for Pipeline Steels seawater subcritical cracking of hy steel weldmentsDec 01, 2010 · Fatigue crack growth rates for the HY-80 steel ranged from 2 to 40 times those for HY-130 in 0.34 MPa hydrogen, which was in turn roughly ten times faster than for either alloy in air. In addition, Nelson found that FCGR in 1020 steel ( y 207 MPa) at near-atmospheric hydrogen pressure increased in the low-cycle regime by more than an seawater subcritical cracking of hy steel weldmentsAA094 PROCESSING OF RARE EARTH MODIFIED HIGH The susceptibility to hydrogen-induced cracking of HY-80 steel weldments was decreased by combined additions of cerium and lanthanum (approximately 60 percent cerium and 40 percent lanthanum) at levels of 0.05, 0.09, and 0.13 weight peff.lt2)with the maximum effect

CORROSION FATIGUE OF A SUPERDUPLEX STAINLESS

stainless steel, Proc. International Manufacturing Conference (IMC-19), Belfast, Northern Ireland, (August 2002). Comer A, Looney L, Corrosion fatigue crack propagation of a welded superduplex stainless steel, Poster presented at the 5th Sir Bernard Crossland Symposium, University of Ulster Jordanstown, Northern Ireland, (March 2002).CREEP CRACKING OF SIMILAR AND DISSIMILAR T92 observed, including cracking in T92 base material (T92 BM), type IV cracking in fine-grained intercritical heat-affected zone (HAZ), type III cracking in the fusion zone at the interface between T92 steel and Ni-based weld metal (Ni WM), over-load cracking at T92/Ni WM interface and cracking in over-tempered T92 BM relating to subcritical HAZCorrosion Fatigue Crack Growth Characteristics of Several seawater subcritical cracking of hy steel weldmentsAbstract. The corrosion-fatigue crack growth properties of several types of HY-100 steel weldments were studied, primarily in an environment of seawater with cathodic protection by zinc anode. Shielded metal-arc (SMAW), gas metal-arc (GMAW) of both pulsed and spray are processes, and submerged-arc (SAW) weldments were included.

Corrosion Fatigue Crack-Growth Behavior of HY-130 Steel seawater subcritical cracking of hy steel weldments

Corrosion Fatigue Crack-Growth Behavior of HY-130 Steel and Weldments D. A. Davis, Fatigue crack propagation was studied in HY-130 steel base plate, as-deposited shielded metal-arc weld metal, and gas metal-arc weld metal using compact specimens. The effects of seawater, cathodic protection, frequency and hold time were investigated.Corrosion fatigue of a superduplex stainless steel weldmentCorrosion fatigue crack growth characteristics of duplex stainless steel weldment in synthetic seawater, (2003). Corrosion fatigue crack propagation of a duplex stainless steel X6 Cr Ni Mo Cu 25-6 in air and in artificial seawater,Corrosion of 18Ni 180 and 18Ni 200 Maraging Steels in seawater subcritical cracking of hy steel weldments18Ni 180 and 18Ni 200 maraging steels have shown high resistance to stress corrosion cracking in sea water. U-bends had no cracks after exposure for over three years. 18Ni 180 welds also had good resistance, but welds in the 18Ni 200 grade suffered stress corrosion cracking.

DTIC ADA136966: Characterizations of Preheated and Non seawater subcritical cracking of hy steel weldments

Preheating HY-80 steel weldments is standard procedure, but it is an expensive and time consuming step in the fabrication of hull structures. The microstructures and hardness profiles of both a preheated (250 F--121 C) and a non-preheated (32 F--0 C) HY-80 steel weldment were studied to provide information and allow comparisons of the microstructural transformations that occur in the heat seawater subcritical cracking of hy steel weldmentsEffect of synthetic sea-water on the crack growth seawater subcritical cracking of hy steel weldmentsSep 01, 1972 · A synthetic sea-water environment does not have a significant effect upon the fatigue crack growth rate properties of HY 140 steel weldments. 2. The fatigue crack growth rate properties of HY140 steel TIG process weld metal are superior to those of the base metal and HAZ material. 3. The fatigue crack growth rate properties of HY140 steel heat seawater subcritical cracking of hy steel weldmentsEffect of synthetic sea-water on the crack growth seawater subcritical cracking of hy steel weldmentsSep 01, 1972 · A synthetic sea-water environment does not induce stress corrosion cracking in HY 140 steel weldments at applied stress intensity levels below 84 ksi Vin. 5. Test specimens larger than 1 in. thick are required to generate plane strain Kiscc data for H Y 140 steel weldments exposed to synthetic sea-water.

Fatigue of High-Yield-Strength Steel Weldments

weldments in which failure initiated at the toe of the weld. An attempt has been made also to relate internal de­ fect type and size with fatigue behav­ ior. Material Three grades of high-yield-strength steel were used in the study: HY-80, HY-100 and HY-130. The chemical composition and mechanical proper­ tie s ofe variou heat each eFracture Toughness of HY-130 Steel Weld Metalson the seawater subcritical cracking behavior of HY-steel weldments. They found that welding parameters, which effectively reheat, refine, and temper the weld metal microstructure, also improve the resistance to susceptibility to subcriti­ cal cracking (SCC) in seawater. In particu­ lar, a weldment fabricated by the gasHydrogen Degradation of High Strength Steel Weldmentshydrogen cracking can occur later in service under unusual conditions. In one case the hydrogen concentration was found to be 1 cc/100 gram in a mild steel weldment, ten years after the welding process took place [9]. This form of cracking is also called cold cracking, delayed cracking or hydrogen assisted cracking.

Hydrogen-Induced Cracking - an overview | ScienceDirect

The weld residual stress and a weld area can be used instead of impact stress and deformed area from seismicity. The models for estimating opening area due to SCC are described in the following section for stainless steel canisters. This approach is equally applicable to the hydrogen-induced cracking of carbon steel.Incoloy&Incoloy 800HT(HY-technique center) - HY industryApr 21, 2019 · Incoloy 800HT is suitable for welding with the same material or other metals by any traditional welding process, such as tungsten electrode inert gas shielded welding, plasma arc welding, manual sub-arc welding, metal inert gas shielded welding, molten inert gas shielded welding, in which pulse arc Welding is the preferred solution. When using seawater subcritical cracking of hy steel weldmentsInfluence of seawater and residual stresses on fatigue seawater subcritical cracking of hy steel weldmentsNov 01, 1991 · Results are presented on fatigue crack growth of weld joints made of C Mn structural steel plates in both air and seawater. Tests were conducted to identify the behavior at different locations of the joints as the frequency, R-ratio and electrochemical potential are varied. Residual stresses in specimens with welds are evaluated to analyse the fatigue crack growth behavior.

Investigation of Residual Stresses h Steel Weldments

in weldments, 45 weldments in mild steel, HY-80 steel, a commercial high-strength structural steel, and SAE 4340 steel. Extensive cracks were found in weldments made in SAE 4340 steel (oil quenched and tempered at 500 F) after hydrogen chargingfor relatively short times. Systematic crack patterns that could be related to residual stress distri-John C. Lippold's research works | The Ohio State seawater subcritical cracking of hy steel weldmentsThe weld interface of Alloy 625 clad on F22 (2.25Cr-1Mo) steel is known to be susceptible to hydrogen assisted cracking (HAC) and sulfide stress cracking (SSC) following postweld heat treatment seawater subcritical cracking of hy steel weldmentsMetallurgical Characteristics of High Strength Structural seawater subcritical cracking of hy steel weldmentsMetals Developed for Fabricating HY-130(T) Steel Weldments . .. .. * e * a * * * * * .105 Charpy V (Cv) Fracture Toughness of HY-130(T) Plates and seawater subcritical cracking of hy steel weldments The subcritical crack growth characteristics of the high strength metals are studied under conditions of low cycle fatigue. Environmental

Metallurgical Characteristics of High Strength Structural seawater subcritical cracking of hy steel weldments

The subcritical crack growth characteristics of the high strength metals are studied under conditions of low cycle fatigue. Environmental effects on subcritical crack growth and the application of fracture mechanics techniques for the spectrum of material under investigation are also being studied.Microstructure and Properties of Friction Stir Processed seawater subcritical cracking of hy steel weldmentsK. Masubuchi and D. C. Martin, Mechanisms of Cracking in HY-80 Steel Weldments, Welding Journal, vol. 41, pp. 375S-384S, 1962. Google ScholarSUBS' HULL PROBLEMS RESURFACING - Hartford CourantSep 08, 1991 · Preheating the steel in the area of the weld, he said, allows hydrogen to escape and slows the cooling process of the weld. Preheating is essential, he said, in welding HY steels.

Seawater Subcritical Cracking of HY-Steel Weldments

Seawater Subcritical Cracking of HY-Steel Weldments Welding procedures that produce a refined, tempered microstructure are necessary for achieving the best seawater subcritical cracking resistance in HY-steel weld metals By C. A. ZANIS, P. W. HOLSBERG, AND E. C. DUNN, JR. ABSTRACT. The seawater subcritical cracking (SCC) resistance of HY-100Statistical behaviour of fatigue crack growth for HY-80 seawater subcritical cracking of hy steel weldmentsJan 01, 1989 · STATISTICAL BEHAVIOUR OF FATIGUE CRACK GROWTH FOR HY-80 STEEL PLATE AND ITS WELDMENTS UNDER CATHODIC PROTECTION IN SEAWATER AND IN AIR J. R. MATTHEWS,+ T. BETANCOURTf and M. ROBICHEAUf fDefence Research Establishment (Atlantic), P.O. Box 1012, Dartmouth, N.S. B2Y 3Z7 Canada tNova Scotia Research Foundation Corporation, Stress Corrosion Cracking - PDF Free DownloadThe cracking occurs in all of the stainless steel shroud weld HAZs. Nishimura et al. [97] investigated the SCC of a commercial austenitic stainless steel type 316 as a function of the sensitizing temperature (750-1300 K) and test temperature (333-373 K) in 0.82 kmol/m3 hydrochloric acid solution using a

Stress Corrosion Behavior of High Strength Steels

Abstract. The effect of stress and environment on the susceptibility to failure of HY-80, HY-130(T), 12Ni maraging, and 18Ni maraging steels has been evaluated by using both pre-notched and smooth specimens. Tests were conducted in sodium chloride solution, artificial sea water, and natural sea water, both with and without cathodic charging.Stress corrosion cracking of maraging steel weldments seawater subcritical cracking of hy steel weldmentsThe maraging steel weldment causes catastrophic failure during service owing to stress corrosion cracking. It is a challenge to comprehend the SCC behaviour for the weldment of this material.Subject Index - ASTM InternationalStress corrosion and cracking (See also Hy- drogen embrittlement) in austenitic stainless steels, 403 from chloride, 209 critical hydrogen concentrations, 353 in HY-80 steel, 274 from hydrogen sulfide, 55, 178, 190, 200 from sulfide, 55, 178, 190, 200 susceptibility screening, 173, 200

The correlation of microstructure and stress corrosion seawater subcritical cracking of hy steel weldments

Microstructure is among the most important factors known to affect the stress corrosion cracking (SCC) susceptibility of medium and high strength steels. Multipass welding can produce various microstructures in the weld and heat affected zone on quite a fine scale, so that intimately mixed fracture modes are observed on SCC specimens of such welds.The correlation of microstructure and stress corrosion seawater subcritical cracking of hy steel weldmentsMicrostructure is among the most important factors known to affect the stress corrosion cracking (SCC) susceptibility of medium and high strength steels. Multipass welding can produce various microstructures in the weld and heat affected zone on quite a fine scale, so that intimately mixed fracture modes are observed on SCC specimens of such welds.Weldability of Steels IspatGuruApr 13, 2016 · Steels with lower CE values generally show good weldability. When the CE of the steel is less than 0.45 %, weld cracking is unlikely, and no heat treatment is needed. When the CE of the steel is between 0.45 % and 0.60 %, weld cracking is likely to take place, and preheating in the range of around 100 deg C to 400 deg C is generally suggested.

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