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  • 1
    Electronic Resource
    Electronic Resource
    Fatigue Crack Growth Behaviors of AISI Type 347 Nuclear Piping Material (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 1129-1132 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The effect of the temperature and microstructure on the fatigue crack growth behaviors oftwo microstucturally different AISI type 347 stainless steel(SS)s are studied at reactor operatingtemperature conditions. From the results, it was observed that the fatigue crack growth rate(FCGR) oftype 347 SS increased as the test temperature was increased. However, its temperature sensitivity wasreduced when the ΔK was large. The measured FCGRs for both TP347-LP and TP347-HP at 25oCand 345oC were lower than those presented in the ASME code. Especially near the threshold region,the trend curve in ASME code overestimated the FCGR of type 347 SS when compared with theobtained data. Even though the effect of the microstructure on the macro-crack growth rate was notsignificant during stage 2, the differences between threshold values for the specimen with a highprecipitate density and the one with a low precipitate density were observed. It is assumed that thesedifferences in the precipitate density, which resulted in a difference in mean free path length ofdislocation movement, are the source of the difference in ΔKth of type 347 steels
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.1129.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Empirical Correlation between Parameters from Small Punch and Tensile Curves of Mn-Mo-Ni Low Alloy Steels by Using Test and FE Analysis (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 420-423 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A load-displacement curve from a small punch test includes several useful informationthat is related to standard test properties such as the tensile property, fracture toughness and ductilebrittletransition temperature. In this study, the empirical relationship between the material propertyfactors in SP curves and the tensile curves has been investigated by comparing test results and finiteelement analysis results. SP and tensile tests and finite element analyses were performed for severalMn-Mo-Ni low alloy steels with different manufacturing processes. It was found that the yield loads(Py) in the SP curves, if they were adequately defined, were linearly related to the yield strength(σ0). The yield loads defined from the intersection point of two lines tangent to the elastic bendingregion and plastic bending region showed a better relation with the yield strength than those fromthe offset line. The slope of the SP curves from the simulation results had a close correlation withthe hardening coefficient and strength constant as well
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.420.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Fatigue Crack Propagation Behavior Near Fusion Line between SA508 Steel and Ni-Based Buttering Metal (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 154-157 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Fatigue crack propagation behavior near the fusion line between SA508 ferritic steel andNi-based buttering metal was studied to assess the integrity of dissimilar metal welded zone in reactorpressure vessels. Ni-based filler metal has been used as a buttering or filler metal to weld the ferriticsteel to the Ni-alloy or austenitic stainless steel. The J integral value and stress field at the crack tip ina simulated small-CT welded specimen model was calculated by using the commercial FE calculationcode to anticipate the effect of the yield strength differences between dissimilar metals. If theNi-based buttering metal has lower yield strength, which means the decrease of material constraint bythe weld metal, the J integral value of the crack tip in the base metal near the fusion line wascalculated higher than that of the base metal. The fatigue crack propagation behavior near the fusionline was measured by using the small-CT welded specimens of 5 mm thickness. The relationshipsbetween da/dN and )K were measured in the base metal and the HAZ near fusion line. The yieldstrength of the weld metal including microstructure at the joint can be considered more effective thanthe material constraint on explaining the behavior of fatigue crack propagation near the fusion line
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.154.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Development of a Code for 2D Elasto-Plastic Fracture Mechanics Analyses Using the Finite Element Alternating Method (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 270-273 (Aug. 2004), p. 1159-1164 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/48/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.270-273.1159.pdf
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    Paper (German National Licenses)
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