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Basic research for alloy design of Nb-base alloys as ultra high temperature structural materials; Chokoon kozoyo niobuki gokin no gokin sekkei no tame no kisoteki kenkyu

Abstract

This paper describes an influence of additional elements on the high temperature deformation behavior of Nb-base solid solution alloys. Highly concentrated solid solution single crystals of Nb-Ta and Nb-Mo alloys were prepared. Compression test and strain rate sudden change test were conducted in the vacuum at temperatures ranging from 77 to 1773 K, to determine the strain rate sensitivity index. Yield stress of the Nb-Ta alloy was similar to that of Nb alloy at temperatures over 0.3{times}T{sub M}, where T{sub M} is fusing point of Nb. While, the yield stress increased with increasing the impurity oxygen concentration at temperatures below 0.3{times}T{sub M}. The yield stress became much higher than that of Nb alloy. The strain rate sensitivity index showed positive values in the whole temperature range. On the other hand, the yield stress of Nb-Mo alloy was higher than that of Nb alloy in the whole temperature range, and increased with increasing the Mo concentration. The strain rate sensitivity index showed negative values at the temperature range from 0.3{times}T{sub M} to 0.4{times}T{sub M}. It was found that serration occurred often for Nb-40Mo alloys. 1 ref., 4 figs., 1 tab.
Authors:
Miura, E; [1]  Yoshimi, K; Hanada, S [2] 
  1. Tohoku University, Sendai (Japan)
  2. Tohoku Univ., Sendai (Japan). Research Inst. for Iron, Steel and Other Metals
Publication Date:
Feb 01, 1997
Product Type:
Conference
Report Number:
CONF-970283-
Reference Number:
SCA: 360103; PA: NEDO-97:820058; EDB-97:111894; SN: 97001833139
Resource Relation:
Conference: Report meeting for the results of `the publicly applied proposal type and hi-tech (emphasized) field research and development in fiscal 1995`, 1995 nendo teian kobogata saisentan (juten) bun`ya kenkyu kaihatsu seika hokokukai, Tokyo (Japan), 12-14 Feb 1997; Other Information: PBD: Feb 1997; Related Information: Is Part Of Preprint of the results of `the publicly applied proposal type and hi-tech (emphasized) field research and development in fiscal 1995`; PB: 469 p.; `1995 nendo teian kobogata saisentan (juten) bun`ya kenkyu kaihatsu` seika hokokukai yokoshu
Subject:
36 MATERIALS SCIENCE; NIOBIUM BASE ALLOYS; YIELD STRENGTH; MOLYBDENUM ALLOYS; TANTALUM ALLOYS; SOLID SOLUTIONS; TEMPERATURE RANGE 1000-4000 K; DEFORMATION; STRAIN RATE; HEAT RESISTING ALLOYS
OSTI ID:
510513
Research Organizations:
New Energy and Industrial Technology Development Organization, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97757283; TRN: 97:820058
Availability:
Available from New Energy and Industrial Technology Development Organization, Sunshine 60, 30F 1-1, 3-chome, Higashi-Ikebukuro, Toshima-ku, Tokyo, Japan; OSTI as DE97757283
Submitting Site:
NEDO
Size:
pp. 438-439
Announcement Date:

Citation Formats

Miura, E, Yoshimi, K, and Hanada, S. Basic research for alloy design of Nb-base alloys as ultra high temperature structural materials; Chokoon kozoyo niobuki gokin no gokin sekkei no tame no kisoteki kenkyu. Japan: N. p., 1997. Web.
Miura, E, Yoshimi, K, & Hanada, S. Basic research for alloy design of Nb-base alloys as ultra high temperature structural materials; Chokoon kozoyo niobuki gokin no gokin sekkei no tame no kisoteki kenkyu. Japan.
Miura, E, Yoshimi, K, and Hanada, S. 1997. "Basic research for alloy design of Nb-base alloys as ultra high temperature structural materials; Chokoon kozoyo niobuki gokin no gokin sekkei no tame no kisoteki kenkyu." Japan.
@misc{etde_510513,
title = {Basic research for alloy design of Nb-base alloys as ultra high temperature structural materials; Chokoon kozoyo niobuki gokin no gokin sekkei no tame no kisoteki kenkyu}
author = {Miura, E, Yoshimi, K, and Hanada, S}
abstractNote = {This paper describes an influence of additional elements on the high temperature deformation behavior of Nb-base solid solution alloys. Highly concentrated solid solution single crystals of Nb-Ta and Nb-Mo alloys were prepared. Compression test and strain rate sudden change test were conducted in the vacuum at temperatures ranging from 77 to 1773 K, to determine the strain rate sensitivity index. Yield stress of the Nb-Ta alloy was similar to that of Nb alloy at temperatures over 0.3{times}T{sub M}, where T{sub M} is fusing point of Nb. While, the yield stress increased with increasing the impurity oxygen concentration at temperatures below 0.3{times}T{sub M}. The yield stress became much higher than that of Nb alloy. The strain rate sensitivity index showed positive values in the whole temperature range. On the other hand, the yield stress of Nb-Mo alloy was higher than that of Nb alloy in the whole temperature range, and increased with increasing the Mo concentration. The strain rate sensitivity index showed negative values at the temperature range from 0.3{times}T{sub M} to 0.4{times}T{sub M}. It was found that serration occurred often for Nb-40Mo alloys. 1 ref., 4 figs., 1 tab.}
place = {Japan}
year = {1997}
month = {Feb}
}