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 1989 |
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All Science Journal Classification (ASJC) codes
- Mechanical Engineering
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Postweld heat treatment cracking in chromium molybdenum steels. / Lundin, C. D.; Henning, J. A.; Menon, R.; Todd Copley, Judith.
In: Welding Research Council Bulletin, No. 349, 12.1989, p. 1-21.Research output: Contribution to journal › Article
TY - JOUR
T1 - Postweld heat treatment cracking in chromium molybdenum steels
AU - Lundin, C. D.
AU - Henning, J. A.
AU - Menon, R.
AU - Todd Copley, Judith
PY - 1989/12
Y1 - 1989/12
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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M3 - Article
AN - SCOPUS:0024795378
SP - 1
EP - 21
JO - Welding Research Council Bulletin
JF - Welding Research Council Bulletin
SN - 0043-2326
IS - 349
ER -