Effect of Chromium Content on Mechanical Properties of V-xCr-4Ti-0.15Y Alloys
نویسندگان
چکیده
A combined effect of purification and yttrium (Y) addition was investigated to improve impact properties of high-chromium V-xCr-4Ti alloys. Tensile tests and Charpy impact tests were carried out by using miniaturized specimens. V-10Cr-4Ti-0.15Y alloy had ultimate tensile stress (UTS) at 700 oC and yield stress (YS) approximately equal to and higher than those of V-4Cr-4Ti alloy, respectively. V-10Cr-4Ti-0.15Y alloy had more favorable impact properties than those of previous V-xCr-4Ti alloys with x > 9 wt.%. It is proposed that purification and Y addition may suppress the formation of the large Ti-rich complexes with carbon, oxygen and nitrogen which act as crack initiation sites.
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