Abstract
An investigation of material properties have been performed on a turbine disc made of a new 12 % Cr steel with improved creep properties. The disc was made through the powder metallurgy route (P/M HIP) of a modified 12 % Cr steel which was identified in a previous alloy development programme. The aim of the present investigation was to compare properties at different locations of the disc to determine homogeneity of the disc and to verify that the same properties previously achieved on HIP-ed bar material could be achieved on large turbine components. The results of the investigation show that the turbine disc was very homogeneous, both in structure and in mechanical properties. Tensile, impact, HCF, LCF, fracture toughness and creep tests have been performed. All results were in accordance with the previously tested bar material. Furthermore the HCF, LCF and toughness properties are comparable to conventional 12 % Cr steel but elevated temperature strength and creep properties are far better than conventional steel. The creep rupture strength is about 40 - 80 % higher than conventional X21CrMoV121 at temperatures 550 - 660 deg C. The tests have shown the possibility of producing large turbine components through the P/M HIP
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Faellman, S
[1]
- ABB STAL AB, TPTU, Finspaang (Sweden)
Citation Formats
Faellman, S.
Mechanical properties of a turbine disc made of a new 12% Cr steel with improved creep properties.
Sweden: N. p.,
1993.
Web.
Faellman, S.
Mechanical properties of a turbine disc made of a new 12% Cr steel with improved creep properties.
Sweden.
Faellman, S.
1993.
"Mechanical properties of a turbine disc made of a new 12% Cr steel with improved creep properties."
Sweden.
@misc{etde_10142835,
title = {Mechanical properties of a turbine disc made of a new 12% Cr steel with improved creep properties}
author = {Faellman, S}
abstractNote = {An investigation of material properties have been performed on a turbine disc made of a new 12 % Cr steel with improved creep properties. The disc was made through the powder metallurgy route (P/M HIP) of a modified 12 % Cr steel which was identified in a previous alloy development programme. The aim of the present investigation was to compare properties at different locations of the disc to determine homogeneity of the disc and to verify that the same properties previously achieved on HIP-ed bar material could be achieved on large turbine components. The results of the investigation show that the turbine disc was very homogeneous, both in structure and in mechanical properties. Tensile, impact, HCF, LCF, fracture toughness and creep tests have been performed. All results were in accordance with the previously tested bar material. Furthermore the HCF, LCF and toughness properties are comparable to conventional 12 % Cr steel but elevated temperature strength and creep properties are far better than conventional steel. The creep rupture strength is about 40 - 80 % higher than conventional X21CrMoV121 at temperatures 550 - 660 deg C. The tests have shown the possibility of producing large turbine components through the P/M HIP route with homogeneous and isotropic properties and with substantially higher elevated temperature strength than conventional 12 % Cr steel. 8 refs, 10 figs, 9 tabs}
place = {Sweden}
year = {1993}
month = {Nov}
}
title = {Mechanical properties of a turbine disc made of a new 12% Cr steel with improved creep properties}
author = {Faellman, S}
abstractNote = {An investigation of material properties have been performed on a turbine disc made of a new 12 % Cr steel with improved creep properties. The disc was made through the powder metallurgy route (P/M HIP) of a modified 12 % Cr steel which was identified in a previous alloy development programme. The aim of the present investigation was to compare properties at different locations of the disc to determine homogeneity of the disc and to verify that the same properties previously achieved on HIP-ed bar material could be achieved on large turbine components. The results of the investigation show that the turbine disc was very homogeneous, both in structure and in mechanical properties. Tensile, impact, HCF, LCF, fracture toughness and creep tests have been performed. All results were in accordance with the previously tested bar material. Furthermore the HCF, LCF and toughness properties are comparable to conventional 12 % Cr steel but elevated temperature strength and creep properties are far better than conventional steel. The creep rupture strength is about 40 - 80 % higher than conventional X21CrMoV121 at temperatures 550 - 660 deg C. The tests have shown the possibility of producing large turbine components through the P/M HIP route with homogeneous and isotropic properties and with substantially higher elevated temperature strength than conventional 12 % Cr steel. 8 refs, 10 figs, 9 tabs}
place = {Sweden}
year = {1993}
month = {Nov}
}