Zum Einfluß des Ni‐Gehaltes austenitischer Stähle auf den Mechanismus der Rißausbreitung bei der chloridinduzierten transkristallinen Spannungsrißkorrosion

Engelmann, Hans‐Jürgen; Mummert, K.

doi:10.1002/maco.19930441105

Cited by 7 publications

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ambient conditions such as chloride concentration, temperature, pH-value, cation species, pressure and time are strongly influencing CISCC. In addition alloying and metallurgical factors play an important role as well [2][3][4][5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

Accelerated SCC Testing of Stainless Steels According to Corrosion Resistance Classes

Borchert¹,

Mori²,

Bischof³

et al. 2015

Corrosion Science and Technology

View full text Add to dashboard Cite

The German Guidelines for stainless steel in buildings (Z.30.3-6) issued by the German Institute for Building Technology (DIBt) categorizevarious stainless steel grades into five corrosion resistance classes (CRCs). Only 21 frequently used grades are approved and assigned to these CRCs. To assign new or less commonly used materials, a large program of outdoor exposure tests and laboratory tests is required. The present paper shows theresults of stress corrosion cracking (SCC) tests that can distinguish between different CRCs. Slow strain rate tests (SSRT) were performedin various media and at different temperatures. CRC IV could be distinguished from CRC II and CRC III with a 31.3 % Clas MgCl 2 solutionat 140 °C. CRC II and CRC III could be differentiated by testing in a 30% Clas MgCl 2 solutionat 100 °C.

show abstract

Section: Introductionmentioning

confidence: 99%

Accelerated SCC Testing of Stainless Steels According to Corrosion Resistance Classes

Borchert¹,

Mori²,

Bischof³

et al. 2015

Corrosion Science and Technology

View full text Add to dashboard Cite

show abstract

Influence of the Ni‐Content on the Cathodic an Corrosive Hydrogen Induced Cracking Behaviour of Austenitic Alloys

Mummert

Engelmann

Schwarz

et al. 1994

Hydrogen Effects in Materials

View full text Add to dashboard Cite

Einfluß der plastischen Verformung auf das Diffusions‐ und Löslichkeitsverhalten von Wasserstoff in Austenitischen Fe‐ und Ni‐Basislegierungen

Uhlemann

Engelmann

Mummert

1995

Materials & Corrosion

View full text Add to dashboard Cite

Es wird das Diffusions-und Loslichkeitsverhalten von Wasserstoff in den hochlegierten austenitischen Werkstoffen 2.4816, 2.4642, 1.4558, 1.4541 im unverformten und bis zu 50% kaltverformten Zustand mit einer elektrochemischen Permeationsmethode und Wasserstoffanalysenmefitechnik (LECO RH 402) untersucht .Mit steigendem Nickelgehalt wird eine Zunahme der Diffusionskoeffizienten, cine Abnahme der Aktivierungsenergien und eine Abnahme der Loslichkeit beobachtet. Eine Kaltverformung der Werkstoffe fuhrt in Abhangigkeit von der Zusammensetzung zu einem veranderten Diffusionsverhalten. Im Werkstoff 1.4541 kommt es infolge von Martensitbildung zu einer Erhohung des Diffusionskoeffizienten um 2 GroBenordnungen. Bei den anderen Werkstoffen fiihrt die Kaltverformung zu einer Erniedrigung des Diffusionskoeffizienten max. urn den Faktor 2,7 und zu hoheren Restwasserstoffgehalten nach Effusion des gelosten Wasserstoffs. Als Ursache werden Trapvorgange an Versetzungskernen und an den wahrend der Beladung entstandenen Rissen angesehen.The measurements of diffusivity and solubility were performed on as received and up to 50% cold worked high alloyed austenitic materials Inconel 600, Inconel 690, Incoloy 800 and AISI 321 by means of an electrochemical permeation method and a hydrogen determination technique (LECO R H 402).With increasing nickel content of the materials the hydrogen diffusivity increases whereas the activation energy of diffusion and the hydrogen solubility decrease.A marked change of the diffusion behaviour is observed in the case of cold worked samples depending on the alloy composition. An increase of diffusivity by about two orders of magnitudes was measured for AISI 321 as a result of a-martensite transformation.The cold working of the other alloys results in a decrease of the diffusivity by a factor of 2.7 maximally and a higher hydrogen content after effusion of the solved hydrogen. This refers to a higher hydrogen trapping. It is assumed that hydrogen atoms are trapped at the cores of dislocations and at microcracks formed during charging. * Dr. rer. nat. K. Murnrnert, Dip1.-Chem. M . Uhlernann, Dr. rer. nat. H.-J. Engelmann Institut fur Festkorper-und Werkstofforschung Dresden e.V

show abstract

Zum Einfluß des Ni‐Gehaltes austenitischer Stähle auf den Mechanismus der Rißausbreitung bei der chloridinduzierten transkristallinen Spannungsrißkorrosion

Cited by 7 publications

References 17 publications

Accelerated SCC Testing of Stainless Steels According to Corrosion Resistance Classes

Accelerated SCC Testing of Stainless Steels According to Corrosion Resistance Classes

Influence of the Ni‐Content on the Cathodic an Corrosive Hydrogen Induced Cracking Behaviour of Austenitic Alloys

Einfluß der plastischen Verformung auf das Diffusions‐ und Löslichkeitsverhalten von Wasserstoff in Austenitischen Fe‐ und Ni‐Basislegierungen

Contact Info

Product

Resources

About