Phase Constitution and Heat Treatment Behavior of Zr-Nb Alloys

Abstract:

Article Preview

Phase constitution in the solution-treated and quenched state and the heat treatment behavior were investigated by electrical resistivity, hardness, and elastic modulus measurements, X-ray diffraction, and optical microscopy. Hexagonal martensite and the β phase were identified in the Zr-5mass%Nb alloy. β and ω phases were identified in the Zr-10 and 15mass%Nb alloys, and only the β phase was identified in the Ti-20Nb alloy. Resistivity at RT, Vickers hardness and elastic modulus increased up to 10Nb and then decreased dramatically at 15Nb. Above 15Nb, these values slightly decreased. The elastic moduli for 15Nb and 20Nb were 59.5 and 55.5 GPa, respectively. On isochronal heat treatment, the isothermal ω phase precipitated between 473 and 623 K and then the α phase precipitated in the 10Nb, 15Nb and 20Nb alloys.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

1435-1440

Citation:

M. Ikeda et al., "Phase Constitution and Heat Treatment Behavior of Zr-Nb Alloys", Materials Science Forum, Vols. 561-565, pp. 1435-1440, 2007

Online since:

October 2007

Export:

Price:

$38.00

[1] Hukushiyougu・seihinkaihatsu no shin-tenkai, ed. by Tore Research center, (Tore research center, Ltd., Tokyo, 2000) p.5.

[2] M. Niinomi: Metall, Mater. Trans. A Vol. 33A (2002), p.477.

[3] T. Ahmed, M. Long, J. Silvetri, C. Ruiz and H. J. Rack, in: Titanium '95: Science and Technology, edited by P. A. Blenkinsop, W. J. Evans and H. M. Flower, The Institute of Materials, London, (1996) , p.1760.

[4] D. Kuroda, M. Niinomi, M. Morinaga, Y. Kato and T. Yashiro: Materials Science and Engineering Vol. A243 (1998), p.244.

[5] E. Takahashi, T. Sakurai, S. Watanabe, N. Masahashi and S. Hanada: Materials Transactions Vol. 43 (2002), p.2978.

[6] M. Ikeda, Y. Nakamura and N. Takahama: J. Japan Inst. Metals, Vol. 67 (2003), p.420.

[7] M. Niinomi in: Structural Biomaterials for the 21 st Century, edited by N. Niinomi, T. Okabe, E. M. Taleff, D. R. Lesure and H. E. Lippard, TMS, Warrendale, (2001), p.3.

2.

4.

6.

8.

[1] 0.

[1] 2.

[1] 4 ρρρρLN, ρρρρRT/µΩµΩµΩµΩm open mark : ρρρρRT solid mark : ρρρρLN ~ ~ ~ ~ : 5Nb : 10Nb : 15Nb : 20Nb.

2.

3.

4.

5.

6.

7.

8.

9.

[1] 0.

[1] 1.

[1] 2 ρρρρLN/ρρρρRT ~ ~ ~ ~ Temperature, T/K 400 600 800 1000 1200 150 200 250 300 350 400 450 HV(Load=4. 9N, n=10) ~ ~ ~ ~ as STQ STQ (1173K-3. 6ks→→→→ W.Q. ).

Fetching data from Crossref.
This may take some time to load.