Mechanical properties of SMA- and SA-welded joints in a steel RAEX 386 P arctic

Martti Vilpas, Hannele Tihekari, Kim Wallin, Risto Karppi

    Research output: Book/ReportReport

    Abstract

    The report gives the test results on mechanical properties of shielded metal arc and submerged are welded joints of normalised steel Raex 386 P Arctic (E StE 355). The joints were tested using conventional hardness, tensile and Charpy-V testing as well as fracture testing. The test results of the welded joints showed reasonably good strength and toughness properties as compared to those of the base material. The ductile-brittle transition behaviour of the joints welded with the arc energies of 17,30 and 50 kJ/cm was, however, found to be located at considerably higher temperatures (in the range of -15 °C to -60 °C) than that of the base material (-60 °C to -80 °C). The Ni-alloyed SMA-welds showed sharper transition behaviour than did the Mn-Si-alloyed SA-welds. On the other hand, the transition temperatures of the fusion boundaries were lower in the SAW-tests than in the SMAW-tests carried out with the same arc energy. The Kj-test results showed that the arc energy should be kept low (~17 kJ/cm) to achieve good fracture toughness properties in welded joints of the steel Raex 386 P Arctic. The SMA-welds showed somewhat more brittle fracture behaviour than did the corresponding SA-welds. A probable explanation for this is inhomogenity in the SMA-welds, which probably results from weaving used in the SMAWtests. The influence of arc energy on the toughness was found to be more pronounced in the fracture mechanics tests than in the Charpy-V tests. This is probably due to the use of full thickness test specimens in the fracture mechanics tests, in which the fracture toughness is also affected by the properties in the weld root. This effect is not seen in the Charpy-V tests, the specimens of which were taken from the surface area of the joints.
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages25
    ISBN (Print)951-38-2235-4
    Publication statusPublished - 1985
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
    Number339
    ISSN0358-5077

    Fingerprint

    Welds
    Mechanical properties
    Steel
    Fracture mechanics
    Toughness
    Fracture toughness
    Fracture testing
    Brittle fracture
    Superconducting transition temperature
    Fusion reactions
    Hardness
    Testing
    Metals

    Keywords

    • high strength steels
    • toughness
    • ductility
    • welded joints
    • strength
    • fracture properties
    • impact tests
    • weld defects

    Cite this

    Vilpas, M., Tihekari, H., Wallin, K., & Karppi, R. (1985). Mechanical properties of SMA- and SA-welded joints in a steel RAEX 386 P arctic. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 339
    Vilpas, Martti ; Tihekari, Hannele ; Wallin, Kim ; Karppi, Risto. / Mechanical properties of SMA- and SA-welded joints in a steel RAEX 386 P arctic. Espoo : VTT Technical Research Centre of Finland, 1985. 25 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 339).
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    abstract = "The report gives the test results on mechanical properties of shielded metal arc and submerged are welded joints of normalised steel Raex 386 P Arctic (E StE 355). The joints were tested using conventional hardness, tensile and Charpy-V testing as well as fracture testing. The test results of the welded joints showed reasonably good strength and toughness properties as compared to those of the base material. The ductile-brittle transition behaviour of the joints welded with the arc energies of 17,30 and 50 kJ/cm was, however, found to be located at considerably higher temperatures (in the range of -15 °C to -60 °C) than that of the base material (-60 °C to -80 °C). The Ni-alloyed SMA-welds showed sharper transition behaviour than did the Mn-Si-alloyed SA-welds. On the other hand, the transition temperatures of the fusion boundaries were lower in the SAW-tests than in the SMAW-tests carried out with the same arc energy. The Kj-test results showed that the arc energy should be kept low (~17 kJ/cm) to achieve good fracture toughness properties in welded joints of the steel Raex 386 P Arctic. The SMA-welds showed somewhat more brittle fracture behaviour than did the corresponding SA-welds. A probable explanation for this is inhomogenity in the SMA-welds, which probably results from weaving used in the SMAWtests. The influence of arc energy on the toughness was found to be more pronounced in the fracture mechanics tests than in the Charpy-V tests. This is probably due to the use of full thickness test specimens in the fracture mechanics tests, in which the fracture toughness is also affected by the properties in the weld root. This effect is not seen in the Charpy-V tests, the specimens of which were taken from the surface area of the joints.",
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    Vilpas, M, Tihekari, H, Wallin, K & Karppi, R 1985, Mechanical properties of SMA- and SA-welded joints in a steel RAEX 386 P arctic. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 339, VTT Technical Research Centre of Finland, Espoo.

    Mechanical properties of SMA- and SA-welded joints in a steel RAEX 386 P arctic. / Vilpas, Martti; Tihekari, Hannele; Wallin, Kim; Karppi, Risto.

    Espoo : VTT Technical Research Centre of Finland, 1985. 25 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 339).

    Research output: Book/ReportReport

    TY - BOOK

    T1 - Mechanical properties of SMA- and SA-welded joints in a steel RAEX 386 P arctic

    AU - Vilpas, Martti

    AU - Tihekari, Hannele

    AU - Wallin, Kim

    AU - Karppi, Risto

    PY - 1985

    Y1 - 1985

    N2 - The report gives the test results on mechanical properties of shielded metal arc and submerged are welded joints of normalised steel Raex 386 P Arctic (E StE 355). The joints were tested using conventional hardness, tensile and Charpy-V testing as well as fracture testing. The test results of the welded joints showed reasonably good strength and toughness properties as compared to those of the base material. The ductile-brittle transition behaviour of the joints welded with the arc energies of 17,30 and 50 kJ/cm was, however, found to be located at considerably higher temperatures (in the range of -15 °C to -60 °C) than that of the base material (-60 °C to -80 °C). The Ni-alloyed SMA-welds showed sharper transition behaviour than did the Mn-Si-alloyed SA-welds. On the other hand, the transition temperatures of the fusion boundaries were lower in the SAW-tests than in the SMAW-tests carried out with the same arc energy. The Kj-test results showed that the arc energy should be kept low (~17 kJ/cm) to achieve good fracture toughness properties in welded joints of the steel Raex 386 P Arctic. The SMA-welds showed somewhat more brittle fracture behaviour than did the corresponding SA-welds. A probable explanation for this is inhomogenity in the SMA-welds, which probably results from weaving used in the SMAWtests. The influence of arc energy on the toughness was found to be more pronounced in the fracture mechanics tests than in the Charpy-V tests. This is probably due to the use of full thickness test specimens in the fracture mechanics tests, in which the fracture toughness is also affected by the properties in the weld root. This effect is not seen in the Charpy-V tests, the specimens of which were taken from the surface area of the joints.

    AB - The report gives the test results on mechanical properties of shielded metal arc and submerged are welded joints of normalised steel Raex 386 P Arctic (E StE 355). The joints were tested using conventional hardness, tensile and Charpy-V testing as well as fracture testing. The test results of the welded joints showed reasonably good strength and toughness properties as compared to those of the base material. The ductile-brittle transition behaviour of the joints welded with the arc energies of 17,30 and 50 kJ/cm was, however, found to be located at considerably higher temperatures (in the range of -15 °C to -60 °C) than that of the base material (-60 °C to -80 °C). The Ni-alloyed SMA-welds showed sharper transition behaviour than did the Mn-Si-alloyed SA-welds. On the other hand, the transition temperatures of the fusion boundaries were lower in the SAW-tests than in the SMAW-tests carried out with the same arc energy. The Kj-test results showed that the arc energy should be kept low (~17 kJ/cm) to achieve good fracture toughness properties in welded joints of the steel Raex 386 P Arctic. The SMA-welds showed somewhat more brittle fracture behaviour than did the corresponding SA-welds. A probable explanation for this is inhomogenity in the SMA-welds, which probably results from weaving used in the SMAWtests. The influence of arc energy on the toughness was found to be more pronounced in the fracture mechanics tests than in the Charpy-V tests. This is probably due to the use of full thickness test specimens in the fracture mechanics tests, in which the fracture toughness is also affected by the properties in the weld root. This effect is not seen in the Charpy-V tests, the specimens of which were taken from the surface area of the joints.

    KW - high strength steels

    KW - toughness

    KW - ductility

    KW - welded joints

    KW - strength

    KW - fracture properties

    KW - impact tests

    KW - weld defects

    M3 - Report

    SN - 951-38-2235-4

    T3 - Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports

    BT - Mechanical properties of SMA- and SA-welded joints in a steel RAEX 386 P arctic

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Vilpas M, Tihekari H, Wallin K, Karppi R. Mechanical properties of SMA- and SA-welded joints in a steel RAEX 386 P arctic. Espoo: VTT Technical Research Centre of Finland, 1985. 25 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 339).