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:
Metal dusting is a catastrophic corrosion phenomenon that leads to the disintegration ofstructural metals and alloys into dust composed of fine particles of the metal/alloy and carbon at hightemperature. Considerable research efforts has been taken on the initiation of metal dusting in thealloy since it was observed. However, the previous researches were focused mostly on the initiationmechanisms of metal dusting without external applied loads. In fact, structural materials are mostlyused with external applied loads. It is thus necessary to study the initiation and propagationmechanism of metal dusting in the stressed condition. In the present work pure bending testing ofCr-Mo alloy in metal dusting condition was performed. The laboratory experiments were performedat 560°C, using a synthesis gas mixture with composition 75%H2 + 25%CO. The maximum bendingstresses were 100MPa, 50MPa, 10MPa and 0MPa, respectively. Post exposure metallographicalexaminations, SEM, EDX analysis were made in order to identify the difference between loaded andunloaded specimens. The effect of mechanical and chemical interaction on high temperaturecorrosion was preliminary discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.341.pdf
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