Failure mechanisms and design of dissimilar welds of 9%Cr and CrMoV steels up to very high cycle fatigue regime
Source abstract
Abstract
Abstract Cross-weld and pure base metal specimens machined from dissimilar welded joints of 9%Cr and CrMoV steels were cyclically loaded up to very high cycle fatigue at 500 °C under load ratio of zero. Results showed fatigue strength of the welds was greatly weakened, lower than base metals. A transition of failure mechanisms from geometrical soft zone in heat-affected zone of CrMoV steel to micro-defects induced cracking at weld metal was responsible for decreasing fatigue strength reduction factor with the increasing of fatigue lifetime. A sound fatigue design requires careful selection of filler metal and consideration of soft zone and micro-defects.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · Microstructure and Mechanical Properties of Steels · High Temperature Alloys and Creep
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (31)
Show source-provided references
1. Mechanical and structural properties of similar and dissimilar steel joints10.1016/S1044-5803(99)00045-5 ↗
2. Correlation between microstructure, hardness and strength in HAZ of dissimilar welds of rotor steels10.1016/j.msea.2010.03.066 ↗
3. Effects of temperature on tensile and impact behavior of dissimilar welds of rotor steels10.1016/j.matdes.2010.01.055 ↗
4. Dissimilar metal welds-transition joints literature review
5. Gurney · 1979
6. Maddox · 2014
7. Fisher · 1984
8. Review on fracture and crack propagation in weldments – A fracture mechanics perspective10.1016/j.engfracmech.2014.05.012 ↗
9. Hobbacher · 2015
10. On the fatigue performance of laser hybrid welded high Zn 7000 alloys for next generation railway components10.1016/j.ijfatigue.2016.05.017 ↗
11. Fatigue analysis of welded joints: state of development10.1016/S0951-8339(02)00075-8 ↗
12. Fatigue design rules for welded structures
13. Soft zone formation by carbon migration and its effect on the high-cycle fatigue in 9% Cr–CrMoV dissimilar welded joint10.1016/j.matlet.2014.08.158 ↗
14. Microstructure characteristics and temperature-dependent high cycle fatigue behavior of advanced 9% Cr/CrMoV dissimilarly welded joint10.1016/j.msea.2014.07.067 ↗
15. Microstructure-sensitive computational modeling of fatigue crack formation10.1016/j.ijfatigue.2010.01.003 ↗
16. Effect of temperature on high-cycle fatigue and very high cycle fatigue behaviours of a low-strength Cr–Ni–Mo–V steel welded joint10.1111/ffe.12471 ↗
17. Failure mechanisms and fatigue strength assessment of a low strength Cr–Ni–Mo–V steel welded joint: Coupled frequency and size effects10.1016/j.mechmat.2016.06.017 ↗
18. Influence of microstructure and microdefects on long-term fatigue behavior of a Cr–Mo–V steel10.1016/j.msea.2012.03.030 ↗
19. Course of SN-curves especially in the high-cycle fatigue regime with regard to component design and safety10.1016/j.ijfatigue.2006.11.015 ↗
20. Investigation on mechanical properties of 9%Cr/CrMoV dissimilar steels welded joint10.1007/s11665-015-1428-y ↗
21. Correlation of microstructure and fracture toughness of advanced 9Cr/CrMoV dissimilarly welded joint10.1016/j.msea.2015.04.011 ↗
22. Role of stress in the high cycle fatigue behavior of advanced 9Cr/CrMoV dissimilarly welded joint10.1557/jmr.2015.398 ↗
23. Very high cycle fatigue behavior of a low strength welded joint at moderate temperature10.1016/j.ijfatigue.2012.01.014 ↗
24. Microstructural influences on very-high-cycle fatigue-crack initiation in Ti-624610.1007/s11661-008-9633-z ↗
25. Correlating scatter in fatigue life with fracture mechanisms in forged Ti-6242Si Alloy10.1007/s11661-017-4437-7 ↗
26. ASME Boiler and Pressure Vessel Code, Section VIII, The American Society of Mechanical Engineers; 2004.
27. RCC MR Design Code, Section 1, French Society for Design and Construction Rules for Nuclear Island Components; 2002.
28. Recommended Practice DNV-RP-C203, Fatigue Design of Offshore Steel Structures, DET NORSKE VERITAS; 2008.
29. BS 7608:2014+A1:2015, Guide to fatigue design and assessment of steel products, The British Standards Institution; 2015.
30. BS EN 1993-1-9:2005, Eurocode 3: Design of steel structures––Part 1–9: Fatigue, The British Standards Institution; 2005.
31. Material defects as the basis of fatigue design10.1016/j.ijfatigue.2011.12.001 ↗