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Effect of cold work on creep properties of Hastelloy XR

Technical Report:

Abstract

Creep tests of Hastelloy XR, in 10%, 20% cold worked or solution treated condition, were made at 800 at 1000degC for times up to about 2000 ks in order to investigate the effect of cold work on creep properties. The results obtained are as follows: (1) Below 950degC, creep rupture strength of 10% cold worked Hastelloy XR is beyond the value of solution treated one within this experimental condition. 950degC and cold work of 10% are the highest values experienced in an intermediate heat exchanger of the High Temperature Engineering Test Reactor(HTTR) under normal condition, respectively. (2) At 800 and 850degC, creep rupture time of 20% cold worked Hastelloy XR is longer than that of solution treated one. However, the effect disappears above 900degC. At 950 and 1000degC, it becomes shorter than that of solution treated Hastelloy XR. (3) Rupture elongation and reduction of area of cold worked Hastelloy XR are smaller than those of solution treated one. While these values of 10% or 20% cold worked material are lowest at 900degC, they recover considerably at 1000degC. (4) Minimum creep rate, {epsilon}{sub m}, of 10% or 20% cold worked Hastelloy XR is decreased by as much as a factor of  More>>
Authors:
Kurata, Yuji; [1]  Nakajima, Hajime
  1. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment
Publication Date:
Aug 01, 1994
Product Type:
Technical Report
Report Number:
JAERI-Research-94-004
Reference Number:
SCA: 360103; PA: JPN-94:011214; EDB-95:008408; SN: 95001296248
Resource Relation:
Other Information: PBD: Aug 1994
Subject:
36 MATERIALS SCIENCE; HASTELLOY XR; CREEP; REACTOR MATERIALS; HTTR REACTOR; COLD WORKING; RUPTURES; ELONGATION; SOLID SOLUTIONS; RECRYSTALLIZATION; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 1000-4000 K; 360103; MECHANICAL PROPERTIES
OSTI ID:
10102284
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE95722056; TRN: JP9411214
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
37 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Kurata, Yuji, and Nakajima, Hajime. Effect of cold work on creep properties of Hastelloy XR. Japan: N. p., 1994. Web.
Kurata, Yuji, & Nakajima, Hajime. Effect of cold work on creep properties of Hastelloy XR. Japan.
Kurata, Yuji, and Nakajima, Hajime. 1994. "Effect of cold work on creep properties of Hastelloy XR." Japan.
@misc{etde_10102284,
title = {Effect of cold work on creep properties of Hastelloy XR}
author = {Kurata, Yuji, and Nakajima, Hajime}
abstractNote = {Creep tests of Hastelloy XR, in 10%, 20% cold worked or solution treated condition, were made at 800 at 1000degC for times up to about 2000 ks in order to investigate the effect of cold work on creep properties. The results obtained are as follows: (1) Below 950degC, creep rupture strength of 10% cold worked Hastelloy XR is beyond the value of solution treated one within this experimental condition. 950degC and cold work of 10% are the highest values experienced in an intermediate heat exchanger of the High Temperature Engineering Test Reactor(HTTR) under normal condition, respectively. (2) At 800 and 850degC, creep rupture time of 20% cold worked Hastelloy XR is longer than that of solution treated one. However, the effect disappears above 900degC. At 950 and 1000degC, it becomes shorter than that of solution treated Hastelloy XR. (3) Rupture elongation and reduction of area of cold worked Hastelloy XR are smaller than those of solution treated one. While these values of 10% or 20% cold worked material are lowest at 900degC, they recover considerably at 1000degC. (4) Minimum creep rate, {epsilon}{sub m}, of 10% or 20% cold worked Hastelloy XR is decreased by as much as a factor of 20 to 50 at 800 to 900degC. On the other hand, {epsilon}{sub m} of 10% or 20% cold worked material is increased at 1000degC. (5) From the results of microstructure observation of ruptured specimens, decrease in creep rupture strength of cold worked Hastelloy XR is interpreted in terms of extensive recrystallization which occurs during creep at 1000degC. (author).}
place = {Japan}
year = {1994}
month = {Aug}
}