ISSN:
1662-9752
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 results of atmosphere-controlled tensile test in various conditions (with differentstrain rate at different temperature under vacuum, air, or water vapor atmosphere) revealed that theaddition of boron and chromium would improve the elongation as well as ultimate tensile strength(UTS) of the Ni-19Si-3Nb based alloys over a wide range of temperature under air and water vaporatmosphere. The UTS and elongation can reach to 1270 MPa and 14%, respectively at 873K in eachkind of atmosphere. On contrary, the alloy without boron addition only presents ductile mechanicalbehavior in vacuum. This is evident that boron and Cr elements present positive effect onsuppressing the environmental embrittlement in air and water vapor atmosphere from roomtemperature to 1073 K for the Ni-19Si-3Nb base alloy. In addition, both of UTS and elongationpresent quite insensitive on the strain rate when test at the temperature below 973 K. However, theUTS exhibits very dependent on the strain rate when test temperature above 973 K, decreasing theultimate tensile strength with decreasing strain rate
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.419.pdf
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