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  • 1
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 40 (1975), S. 1224-1227 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 42 (1977), S. 600-602 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 42 (1977), S. 2896-2899 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 37 (1965), S. 1382-1386 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 97-98 (Jan. 1995), p. 329-334 
    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
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  • 7
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 14 (1979), S. 1090-1094 
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: For the two-dimensional isoparametric 8-node element an additive condition is formulated, so that the function describing the domain boundary is continually differentiable at the common nodes on the boundary. This condition will be satisfied by moving the mid-side nodes into a special position. The advantage in using this modified element will be shown by an example of the elasto-plastic calculation of a double-edge notched specimen.
    Additional Material: 3 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 20 (1989), S. 384-390 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Influence of specimen thickness on the deformation and fracture behaviour of wide platesThe influence of specimen thickness on the deformation behaviour and the load bearing capacity has been investigated with large scale double-edge-notched-tension-specimens (DENT). The difference of the state of stress can be modelled by simplifications (plain strain, plain stress). Equations for the calculation of plastic limit loads taking into account the defect ratio a/W have been derived based on analytical, numerical and experimental investigations. Already existing equations may lead to unsafe prediction in special situations. The difference between plastic limit and maximum load is smaller for the thicker specimens due to higher toughness requirements. The toughness requirements have been quantified for the DENT-specimens using the J-integral analysis. The requirements mainly depend on the overall dimensions (W, B), the thickness ratio (B/W) and the defect ratio (a/W).
    Additional Material: 11 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 24 (1993), S. 281-286 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Qualitative and Quantitative Description of the Hardening of Iron during Tensile TestThe change of dislocation density as well as the formation of dislocation have been qualitatively and quantitatively investigated. The results obtained show that the hardening of iron during tensile test can be attributed to both the increase of dislocation density and the formation of dislocation cells. The increase of dislocation density plays a predominant roll at small deformations. With increasing deformation, the cell formation which acts like grain refining gains more and more significance. The effect of the cell formation should, therefore, be separately considered, perhaps as a kind of subgrain formation.
    Notes: Die Veränderung der Versetzungsdichte sowie die Zellbildung der Versetzungen in Armco-Eisen wurden in Abhängigkeit von der Zugverformung sowohl qualitativ als auch quantitativ untersucht. Die erzielten Ergebnisse zeigen, daß die Verfestigung von Armco-Eisen im Zugversuch auf die Erhöhung der Versetzungsdichte und die Bildung von Versetzungszellen zurückgeführt werden kann. Die Zunahme der Versetzungsdichte spielt bei geringer Verformung die vorherrschende Rolle. Mit zunehmender Verformung gewinnt die Zellbildung, deren Wirkung einer Kornfeinung ähnelt, immer mehr an Bedeutung. Daher sollte die Wirkung der Zellbildung bei starker Verformung gesondert als eine Art der Subkorn-bildung berücksichtigt werden.
    Additional Material: 8 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 48 (1997), S. 207-215 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigation on stress corrosion cracking of austenitic steels in cold chloride solutionsAt ambient temperatures of about 25°C austenitic chromium nickel steels can suffer stress corrosion in media with a concentration of both hydrogen ions and chloride ions exceeding 1 mol/L or in strongly concentrated chloride solutions. With the aid of constant strain rate testing and with U-bend specimens the parameters of this types of corrosion were investigated. Contrary to the situation with the acid solutions, the reproducibility of test results with the concentrated chloride solution was found to be low. The formation of martensite by cold working was found to be essential. The corrosion susceptibility decreases with increasing nickel content.Stress corrosion takes place within small critical potential ranges without a limit to more positive potentials as this is the case of stress corrosion with hot media. These potential ranges are widened with increasing cold working especially in the case of strongly grinding or cyclic loading in the plastic range.Corrosion cracking was observed with solutions of MgCl2, LiCl, with a less amount with NaCl, but not with ZnCl2. The concentration of chloride ions have an effect for solutions with a given kind of salt, but not for different salt solutions.
    Notes: Bei austenitischen Chrom-Nickel-Stählen kann transkristalline Spannungsrißkorrosion bei 25°C auftreten, wenn sowohl die Wasserstoffionen- als auch die Chloridionen-Konzentration etwa 1 mol/L überschreiten oder wenn stark konzentrierte Chloridlösungen vorliegen. Die Parameter dieser Korrosion wurden mit CERT-Versuchen und mit Bügelproben untersucht. Im Gegensatz zu den sauren Lösungen ist die Reproduzierbarkeit bei den konzentrierten Lösungen gering, wobei im wesentlichen die Bildung von Verformungsmartensit die Korrosionsanfälligkeit bestimmt, die mit ansteigendem Nickelgehalt abnimmt.Die Spannungsrißkorrosion findet in begrenzten Potentialbereichen statt und ist im Gegensatz zu der Spannungsrißkorrosion in warmer Medien zu positiveren Potentialen hin begrenzt. Die Potentialbereiche können mit zunehmender Kaltverformung ausgeweitet werden, wobei eine grobe Schleifbehandlung und zyklische Belastungen im plastischen Bereich die Rißbildung begünstigen.Rißbildung wurde in Lösungen mit MgCl2, LiCl und im geringen Ausmaß auch mit NaCl, nicht aber mit ZnCl2 beobachtet, wobei die Konzentration der Chlorid-Ionen nur innerhalb einer Salzart, nicht aber bei den verschiedenen Lösungen einen erkennbaren Einfluß hat.
    Additional Material: 6 Ill.
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