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Seppo Tähtinen

  • Phone+358503549037
1981 …2013

Research output per year

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Research Output

2002

Ultrasonic examination of ITER primary first wall panel P-SSP-1

Jeskanen, H., Tähtinen, S. & Kauppinen, P., 2002, VTT Technical Research Centre of Finland. 14 p. (VTT Tuotteet ja tuotanto. Tutkimusraportti; No. BTUO73-021063).

Research output: Book/ReportReport

Ultrasonic examination of ITER primary first wall small scale mock-ups DS-13J, DS-16J, DS-17J, PHD-1J, PHS-8J, PHS-7Jb and full scale panel P-PHS-1B

Jeskanen, H., Tähtinen, S. & Kauppinen, P., 2002, VTT Technical Research Centre of Finland. 22 p. (VTT Tuotteet ja tuotanto. Tutkimusraportti; No. BTUO73-021044).

Research output: Book/ReportReport

Ultrasonic studies on iter divertor and first wall prototype modules

Pitkänen, J., Kauppinen, P., Jeskanen, H., Tähtinen, S. & Sandlin, S., 2002, 22nd Symposium on Fusion Technology: Book of Abstracts. Espoo: VTT Technical Research Centre of Finland, p. 78-78 B-36. (VTT Symposium; No. 220).

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Open Access
2001

Dielectric window for reactor like ICRF vacuum transmission line

Heikinheimo, L., Linden, J., Kaye, A., Orivuori, S., Saarelma, S., Tähtinen, S., Walton, R., Wasastjerna, F. & Heikkinen, J. A., 2001, In : Fusion Engineering and Design. 55, 4, p. 419-436 18 p.

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

European achievements for ITER high heat flux components

Merola, M., Vieider, G., Bet, Vastra, I. B., Briottet, L., Chappuis, P., Cheyne, K., Dell'Orco, G., Duglué, D., Duwe, R., Erskine, S., Escourbiac, F., Fèbvre, M., Grattarola, M., Moreschi, F., Orsinini, A., Pamato, R., Petrizzi, L., Plöchl, L., Riccardi, B. & 9 others, Rigal, E., Rödig, M., Salavy, J. F., Schedler, B., Schlosser, J., Tähtinen, S., Vesprini, R., Visca, E. & Wu, C., 2001, In : Fusion Engineering and Design. 56-57, p. 173-178 6 p.

Research output: Contribution to journalArticleScientificpeer-review

27 Citations (Scopus)

European development of carbon armoured plasma facing components for ITER

Merola, M., Vieider, G., Wu, C., Schedler, B., Chappuis, P., Duwe, R., Escourbiac, F., Febvre, M., Grattarola, M., Rödig, M., Schlosser, J., Tähtinen, S. & Vesprini, R., 2001, In : Physica Scripta. T91, p. 104-109

Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review

4 Citations (Scopus)

Investigations of copper to stainless steel joints

Tähtinen, S., Laukkanen, A. & Singh, B. N., 2001, In : Fusion Engineering and Design. 56-57, p. 391-396 6 p.

Research output: Contribution to journalArticleScientificpeer-review

Manufacturing of primary first wall panel by powder hipping

Tähtinen, S., 2001, Espoo: VTT Technical Research Centre of Finland. 17 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-011128).

Research output: Book/ReportReport

Mechanical and fracture properties of neutron irradiated titanium alloys

Tähtinen, S., Moilanen, P. & Singh, B. N., 2001, VTT Technical Research Centre of Finland. 24 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-001077).

Research output: Book/ReportReport

Mixed-mode fracture tests of mismatching copper-stainless steel HIP joints at room and elevated temperatures

Laukkanen, A. & Tähtinen, S., 2001, Espoo: VTT Technical Research Centre of Finland. 26 p. (VTT Manufacturing Technology. Research Report; No. BVAL64-011132).

Research output: Book/ReportReport

Stress corrosion cracking susceptibility of TIG welded and HIP bonded 316L(N) stainless steel: Status report - May 2001

Kosonen, A-M., Taivalaho, L. & Tähtinen, S., 2001, VTT Technical Research Centre of Finland. 24 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-011129).

Research output: Book/ReportReport

Ultrasonic and metallographic examination of ITER vertical target prototype

Tähtinen, S., Jeskanen, H. & Kauppinen, P., 2001, VTT Technical Research Centre of Finland. 27 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-011099).

Research output: Book/ReportReport

Ultrasonic examination of primary first wall small scale mock UPS and full scale panel, DS-15F, PHS-6F, P-PHS-1B

Jeskanen, H., Kauppinen, P. & Tähtinen, S., 2001, VTT Technical Research Centre of Finland. 11 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-011137).

Research output: Book/ReportReport

2000

Application of the internal friction method to studying microstructural effects in fusion materials

Tähtinen, S., Jagodzinski, Y., Tarasenko, A., Smouk, S. & Hänninen, H., 2000, In : Journal of Nuclear Materials. 283-287, Part 1, p. 255 - 258 4 p.

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Damage mechanisms and fracture toughness of GlidCop® CuAl25 IG0 copper alloy

Tähtinen, S., Laukkanen, A. & Singh, B., 2000, In : Journal of Nuclear Materials. 283-287, Part 2, p. 1028 - 1032 5 p.

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Effect of irradiation on structural materials in fusion reactors

Tavassoli, F., Burlet, H., Lind, A., Singh, B. N., Tähtinen, S. & van Osch, E., 2000, Effects of Radiation on Materials: 19th International Symposium. West Conshohocken: American Society for Testing and Materials ASTM, p. 1093-1108 (ASTM Selected Technical Papers; No. STP1366).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Effect of neutron irradiation on mechanical properties of Cu/SS joints after single and multiple HIP cycles

Tähtinen, S., Singh, B. & Toft, P., 2000, In : Journal of Nuclear Materials. 283-287, Part 2, p. 1238 - 1242 5 p.

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Effect of neutron irradiation on tensile and fracture toughness properties of copper alloys and their joints with stainless steel

Tähtinen, S., Pyykkönen, M., Singh, B. & Toft, P., 2000, Effects of Radiation and Materials; 19th International Symposium, STP 1366. West Conshohocken, PA: American Society for Testing and Materials ASTM, p. 1241 - 1259

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

6 Citations (Scopus)

Effects of multiple HIP thermal cycles and neutron irradiation on mechanical properties of copper alloys joint to stainless steel

Tähtinen, S. & Singh, B., 2000, VTT Technical Research Centre of Finland. 12 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-001062).

Research output: Book/ReportReport

Implications of nonlinear mismatch in fracture of bimetallic interfaces

Laukkanen, A. & Tähtinen, S., 2000, Advances in Mechanical Behaviour, Plasticity and Damage: proceedings of Euromat 2000. Miannay, D., Costa, P., Francois, D. & Pineau, A. (eds.). Amsterdam: Elsevier, Vol. 1. p. 103 - 108

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Main achievements of the EU HT test programme of ITER primary wall small scale mock ups

Lorenzetto, P., Cardella, A., Chappuis, P., Daenner, W., Erskine, A., Febvre, M., Hofmann, G., Le Gallo, P., Stamm, H. & Tähtinen, S., 2000, In : Fusion Engineering and Design. 49-50, p. 263-268 6 p.

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Material characterization probe

Jeskanen, H., Kauppinen, P., Pitkänen, J. & Tähtinen, S., 2000, Proceedings of the 15th World Conference on Non-Destructive Testing.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Non destructive examination of primary wall small scale mock-up. DS-6J

Jeskanen, H., Lahdenperä, K., Kauppinen, P. & Tähtinen, S., 2000, VTT Technical Research Centre of Finland. 10 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-001040).

Research output: Book/ReportReport

Non destructive examination of primary wall small scale mock-up. DS-9J

Jeskanen, H., Lahdenperä, K., Kauppinen, P. & Tähtinen, S., 2000, VTT Technical Research Centre of Finland. 10 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-001041).

Research output: Book/ReportReport

Non destructive examination of primary wall small scale mock-up. PHS-4K

Jeskanen, H., Lahdenperä, K., Kauppinen, P. & Tähtinen, S., 2000, VTT Technical Research Centre of Finland. 24 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-001038).

Research output: Book/ReportReport

Non destructive examination of primary wall small scale mock-up. SSMU-DS-5K

Jeskanen, H., Lahdenperä, K., Kauppinen, P. & Tähtinen, S., 2000, VTT Technical Research Centre of Finland. 26 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-001039).

Research output: Book/ReportReport

Non destructive examination of primary wall small scale mock up DS-14F

Jeskanen, H., Lahdenperä, K., Kauppinen, P. & Tähtinen, S., 2000, VTT Technical Research Centre of Finland. 25 p. (VALB; No. 404).

Research output: Book/ReportReport

Non destructive examination of primary wall small scale mock-up PH-P2F

Jeskanen, H., Lahdenperä, K., Kauppinen, P. & Tähtinen, S., 2000, VTT Technical Research Centre of Finland. 15 p. (VALB; No. 267).

Research output: Book/ReportReport

Non destructive examination of primary wall small scale mock-ups. DS-21, DS-31, DS-41, DS-7J, DS-8J, DS-10J, RH-1F

Jeskanen, H., Lahdenperä, K., Kauppinen, P. & Tähtinen, S., 2000, VTT Technical Research Centre of Finland. 24 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-001036).

Research output: Book/ReportReport

Non destructive examination of primary wall small scale mock-ups. DS-5K

Jeskanen, H., Lahdenperä, K., Kauppinen, P. & Tähtinen, S., 2000, VTT Technical Research Centre of Finland. 24 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-001037).

Research output: Book/ReportReport

Tensile and fracture toughness properties of copper alloys to stainless steel joints

Tähtinen, S. & Singh, B., 2000, VTT Technical Research Centre of Finland. 14 p. (VTT Manufacturing Technology. Research Report; No. BVAL62-001030).

Research output: Book/ReportReport

1999

Fracture toughness and internal friction of GlidCop®Al-25 alloy

Tähtinen, S., Pyykkönen, M., Smuk, S., Hänninen, H., Jagodzinski, Y. & Tarasenko, O., 1999, Microstructural Processes in Irradiated Materials. p. 573-578

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

1 Citation (Scopus)

Internal friction study of hydrogen behaviour in low activated martensitic F82H steel

Jagodzinski, Y., Tarasenko, A., Smuk, S., Tähtinen, S. & Hänninen, H., 1999, In : Journal of Nuclear Materials. 275, 1, p. 47-55 9 p.

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

The feasibility of small size specimens for testing of environmentally assisted cracking of irradiated materials and of materials under irradiation in reactor core

Toivonen, A., Moilanen, P., Pyykkönen, M., Tähtinen, S. & Rintamaa, R., 1999, In : Nuclear Engineering and Design. 193, 3, p. 309-316 8 p.

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
1998

Development of dielectric window to conductor assembly

Heikinheimo, L., Nuutinen, S. & Tähtinen, S., 1998, VTT Technical Research Centre of Finland. 41 p. (VALB; No. 294).

Research output: Book/ReportReport

Effect of neutron irradiation on fracture toughness behaviour of copper alloys

Tähtinen, S., Pyykkönen, M., Karjalainen-Roikonen, P., Singh, B. & Toft, P., 1998, In : Journal of Nuclear Materials. 258-263, Part 1, p. 1010-1014

Research output: Contribution to journalArticleScientificpeer-review

29 Citations (Scopus)

Effect of specimen type and size on fracture resistance curve determination of CuCrZr alloy

Karjalainen-Roikonen, P., Pyykkönen, M. & Tähtinen, S., 1998, In : Journal of Nuclear Materials. 258-263, Part 1, p. 462-465

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

FFUSION research programme 1993 1998: Final report of the Finnish fusion research programme

Karttunen, S., Ahola, H., Dumbrajs, O., Halme, A., Heikkinen, J., Heikkinen, V., Keinonen, J., Korhonen, R., Kurki-Suonio, T., Likonen, J., Pättikangas, T., Salomaa, R., Siuko, M., Teuho, J., Tähtinen, S. & Wasastjerna, F., 1998, Espoo: VTT Technical Research Centre of Finland. 158 p. (VTT Publications; No. 368).

Research output: Book/ReportReport

Open Access

Non destructive examination of primary wall small scale mock-up DS-1F

Jeskanen, H., Lahdenperä, K., Kauppinen, P. & Tähtinen, S., 1998, VTT Technical Research Centre of Finland. 34 p. (VALB, Vol. 280).

Research output: Book/ReportReport

The Fracture resistance of bimaterial copper-stainless steel interfaces with three-point bend configuration

Laukkanen, A., Karjalainen-Roikonen, P., Moilanen, P. & Tähtinen, S., 1998, Proceedings of the 12th Bienniel Conference on Fracture,  ECF12. Brown, M. W., de los Rios, E. R. & Miller, K. J. (eds.). Vol. 2. p. 775 - 780

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Development of explosion welding (EXW) technique and characterisation of EXW joints

Tähtinen, S., Ehrnsten, U., Karjalainen-Roikonen, P., Moilanen, P., Kauppinen, P., Auerkari, P. & Rahka, K., 1997, Espoo: VTT Technical Research Centre of Finland. 30 p. (Liekki 2: Poltto- ja kaasutustekniikan tutkimusohjelma; No. VALB-220).

Research output: Book/ReportReport

Effect of lithium hydroxide on stability of fuel cladding oxide film in simulated pressurized water reactor primary water environments

Saario, T., Tähtinen, S. & Piippo, J., 1997, In : Corrosion. 53, 9, p. 724 - 729 6 p.

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Environmentally assisted cracking of alloy 600 in PWR primary water

Ehrnsten, U., Lagerström, J., Saario, T., Piippo, J., Aaltonen, P., Tähtinen, S., Laitinen, T. & Hänninen, H., 1997, Corrosion-deformation interactions CDI '96: Second International Conference on Corrosion-Deformation Interactions in conjunction with EUROCORR '96, Nice, France, 1996. Magnin, T. (ed.). p. 463-472 (European Federation of Corrosion Publications; No. 21).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review