Twin intersection in tensile deformed -TiAl intermetallic compounds

Sawai, Tomotsugu; Hishinuma, Akimichi

Journal of Physics and Chemistry of Solids, 66(2-4), p.335 - 338, 2005/02

https://doi.org/10.1016/j.jpcs.2004.06.059

TiAl intermetallic compounds are potential materials for high temperature structural applications. They have also low induced radio-activity and good radiation resistance, which make these alloys very attractive in nuclear applications. Their ductility at low temperatures should be, however, still improved and their deformation mechanism is of great concern. In this study, intersections of deformation twins in -TiAl grains were examined in Ti-47at%Al alloy specimens tensile-tested at 873 K. Transmission electron microscopy (TEM) revealed 1/2110]{111} ordinary-type dislocations and 1/6112]{111} twins in deformed -TiAl grains. Some -TiAl grains contained twins on two different {111} planes, which intersect along 110] directions (type-1). No twin intersection along 101] (type-2) was observed, which was often reported in compressed specimens. Results are discussed with the Schmid factor distributions of twinning systems and ordinary slip systems as the function of tensile directions.

Mechanical properties on multi stage blazed fin body with ultra fine off-set fin for compact heat exchager at Elevated Temperature

Ishiyama, Shintaro

Nihon Kinzoku Gakkai-Shi, 68(7), p.490 - 497, 2004/07

https://doi.org/10.2320/jinstmet.68.490

SUS304 multi stage blazed fin core body for GTHTR300 was tested its high temperature strength, fatigue and creep and it was found that the body behaves as same strength of SUS304 material.

The Characterization of reinforced TiAl intermetallic with dispersed Cr purticles consolidated by HIP

Ishiyama, Shintaro; Buchkremer, H. P.*; Stver, D.*

Materials Transactions, 43(9), p.2331 - 2336, 2002/09

https://doi.org/10.2320/matertrans.43.2331

no abstracts in English

Ultra-High temperature strength properties on Mod.9Cr-1Mo steel

; Yoshida, Eiichi; Aoto, Kazumi

JNC TN9400 2000-042, 112 Pages, 2000/03

JNC-TN9400-2000-042.pdf:8.55MB

A sodium-water reaction drove from the single tube break in steam generator of FBR might overheat labor tubes rapidly under internal pressure loadings. lf the temperature of tube wall becomes too high, it has to be evaluated that the stress of tube does not exceed the material strength limit to prevent the propagation of tube rupture. This study clarified the tensile and creep properties of Mod.9Cr-1Mo steel at ultra-high temperature which will be used in evaluation of the tube burst by sodium-water reaction. The strain rates for tensile test are from 10%/min to 10%/sec, and creep-rupture time is maximum 277sec. The range of test temperature is 700C to 1300C. The main results obtained were as follows; (1)The evaluation data on the relationship between tensile strength and strain rate and creep-rupture strength in shorter time on Mod.9Cr-1Mo steel were acquired. (2)Short-term mechanical properties of Mod.9Cr-1Mo steel were evaluated based on the results of tensile and creep-rupture tests up to 1300C. As a result of the evaluation, recommended equation of creep-rupture strength in the short-term was proposed. (3)Tensile and creep-rupture strength of Mod.9Cr-1Mo steel tube showed the value which was higher than the 2 1/4Cr-1Mo steel, and it was proven to have the superior properties.

None

*; *; *; *; *; *; *

PNC TJ9009 96-002, 172 Pages, 1995/10

PNC-TJ9009-96-002.pdf:11.22MB

None

Development of a new Ni-Cr-W superalloy for application to high temperature structures

Tsuji, Hirokazu; Nakajima, Hajime; Kondo, Tatsuo

Proc. of the 5th Conf. on Materials for Advanced Power Engineering,Part I, 0, p.939 - 948, 1994/00

no abstracts in English

Development of a filler metal for Hastelloy Alloy XR welded-structures for High Temperature Engineering Test Reactor application

Watanabe, Katsutoshi; Nakajima, Hajime; Sahira, Kensho*; Marushichi, Koki*; Takeiri, Toshiki*; Saito, Teiichiro*; Takatsu, Tamao*; Nakanishi, Tsuneo*; Koikegami, Hajime*; Higuchi, Makoto*

Proc. of the 2nd JAERI Symp. on HTGR Technologies; Oct. 2123,1992,Oarai,Japan (JAERI-M 92-215), p.560 - 574, 1993/01

https://jopss.jaea.go.jp/pdfdata/JAERI-M-92-215.pdf

no abstracts in English

Effects of minor elements on high temperature properties and producibility on Ni-Cr-W superalloys for HTGR application

Tsuji, Hirokazu; Nakajima, Hajime; Kondo, Tatsuo

Proc. of the 2nd ASME/JSME Nuclear Engineering Joint Conf., 1993,Vol. 2, p.167 - 172, 1993/00

no abstracts in English

Development of hastelloy alloy XR filler metal lowered weld cracking susceptibility

Watanabe, Katsutoshi; Nakajima, Hajime; Sahira, Kensho*; Marushichi, Koki*; Takeiri, Toshiki*; Saito, Teiichiro*; Takatsu, Tamao*; Nakanishi, Tsuneo*; Koikegami, Hajime*; Higuchi, Makoto*

Tainetsu Kinzoku Zairyo Dai-123-Iinkai Kenkyu Hokoku, 33(2), p.227 - 242, 1992/00

no abstracts in English

Materials properties data sheet (No. F02); Creep properties data on Mod.9Cr-1Mo steels (Base Metal)

; ; *; *; *; Yoshida, Eiichi;

PNC TN9450 91-010, 259 Pages, 1991/10

PNC-TN9450-91-010.pdf:4.55MB

In order to advancement in materials strength standard on elevated temperature design guide of the FBRs and evaluation method of materials strength behavior, this report are presented about the creep properties of Mod.9Cr-1Mo steels for steam generator, based on the R&D results obtained through the activities of material tests. Contents of the data sheet are as follows; Material : Mod.9Cr-1Mo steels (Base Metal) Plate 7 Heats (F2, F6, F7, F9, F10, NSC1, NSC2) Forging 8 Heats (F4, F5, F8, F11, VIM, ESR, F520, F550) Tube 1 Heats (F3) Test temperature : 450650C Test method : According to JIS and FBR Metallic Materials Test Method Test environment : In Air and in Sodium Number of deta : 314 points