Postweld heat treatment cracking in chromium molybdenum steels

C. D. Lundin; J. A. Henning; R. Menon; J. A. Todd

Postweld heat treatment cracking in chromium molybdenum steels

C. D. Lundin, J. A. Henning, R. Menon, J. A. Todd

Research output: Contribution to journal › Article › peer-review

Abstract

The postweld heat treatment (PWHT) cracking susceptibility of standard and modified 2 1/4 Cr-1Mo and 3Cr-1 and 1 1/2 Mo steels has been investigated. The modified steels tested include three heats of 3Cr-1 1/2 Mo-0.1V, a heat of 3Cr-1 1/2 Mo- 1/2 Ni and a heat each of V-Ti-B modified 2 1/4 Cr-1Mo and 3Cr-1Mo. Tests used to evaluate PWHT cracking susceptibility were Gleeble simulation and a 'C-Ring' test adapted from that described in ASTM G-38 (used to evaluate stress corrosion cracking susceptibility). Transmission electron microscopy of carbide extraction replicas leads to the general conclusion that elements (such as V, Si) that contribute to the stability of coherent matrix precipitates of the MC, M₂C or M₄C₃ type lead to enhanced susceptibility of PWHT cracking. The presence of elements such as nickel that will drive the precipitation process faster towards equilibrium, reduces susceptibility to PWHT cracking.

Original language	English (US)
Pages (from-to)	1-21
Number of pages	21
Journal	Welding Research Council Bulletin
Issue number	349
State	Published - Dec 1 1989

All Science Journal Classification (ASJC) codes

Mechanical Engineering

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title = "Postweld heat treatment cracking in chromium molybdenum steels",

abstract = "The postweld heat treatment (PWHT) cracking susceptibility of standard and modified 2 1/4 Cr-1Mo and 3Cr-1 and 1 1/2 Mo steels has been investigated. The modified steels tested include three heats of 3Cr-1 1/2 Mo-0.1V, a heat of 3Cr-1 1/2 Mo- 1/2 Ni and a heat each of V-Ti-B modified 2 1/4 Cr-1Mo and 3Cr-1Mo. Tests used to evaluate PWHT cracking susceptibility were Gleeble simulation and a 'C-Ring' test adapted from that described in ASTM G-38 (used to evaluate stress corrosion cracking susceptibility). Transmission electron microscopy of carbide extraction replicas leads to the general conclusion that elements (such as V, Si) that contribute to the stability of coherent matrix precipitates of the MC, M2C or M4C3 type lead to enhanced susceptibility of PWHT cracking. The presence of elements such as nickel that will drive the precipitation process faster towards equilibrium, reduces susceptibility to PWHT cracking.",

author = "Lundin, {C. D.} and Henning, {J. A.} and R. Menon and Todd, {J. A.}",

year = "1989",

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T1 - Postweld heat treatment cracking in chromium molybdenum steels

AU - Lundin, C. D.

AU - Henning, J. A.

AU - Menon, R.

AU - Todd, J. A.

PY - 1989/12/1

Y1 - 1989/12/1

N2 - The postweld heat treatment (PWHT) cracking susceptibility of standard and modified 2 1/4 Cr-1Mo and 3Cr-1 and 1 1/2 Mo steels has been investigated. The modified steels tested include three heats of 3Cr-1 1/2 Mo-0.1V, a heat of 3Cr-1 1/2 Mo- 1/2 Ni and a heat each of V-Ti-B modified 2 1/4 Cr-1Mo and 3Cr-1Mo. Tests used to evaluate PWHT cracking susceptibility were Gleeble simulation and a 'C-Ring' test adapted from that described in ASTM G-38 (used to evaluate stress corrosion cracking susceptibility). Transmission electron microscopy of carbide extraction replicas leads to the general conclusion that elements (such as V, Si) that contribute to the stability of coherent matrix precipitates of the MC, M2C or M4C3 type lead to enhanced susceptibility of PWHT cracking. The presence of elements such as nickel that will drive the precipitation process faster towards equilibrium, reduces susceptibility to PWHT cracking.

AB - The postweld heat treatment (PWHT) cracking susceptibility of standard and modified 2 1/4 Cr-1Mo and 3Cr-1 and 1 1/2 Mo steels has been investigated. The modified steels tested include three heats of 3Cr-1 1/2 Mo-0.1V, a heat of 3Cr-1 1/2 Mo- 1/2 Ni and a heat each of V-Ti-B modified 2 1/4 Cr-1Mo and 3Cr-1Mo. Tests used to evaluate PWHT cracking susceptibility were Gleeble simulation and a 'C-Ring' test adapted from that described in ASTM G-38 (used to evaluate stress corrosion cracking susceptibility). Transmission electron microscopy of carbide extraction replicas leads to the general conclusion that elements (such as V, Si) that contribute to the stability of coherent matrix precipitates of the MC, M2C or M4C3 type lead to enhanced susceptibility of PWHT cracking. The presence of elements such as nickel that will drive the precipitation process faster towards equilibrium, reduces susceptibility to PWHT cracking.

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JO - Welding Research Council Bulletin

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SN - 0043-2326

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ER -

Postweld heat treatment cracking in chromium molybdenum steels

Abstract

All Science Journal Classification (ASJC) codes

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