Experimental Investigation of Fatigue Crack Growth Behavior of the 2.25Cr1Mo0.25V Steel Welded Joint Used in Hydrogenation Reactors

Song, Yan; Chai, Mengyu; Han, Zelin

doi:10.3390/ma14051159

Cited by 7 publications

(6 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The study of Fatigue Crack Growth (FCG) behavior in welds is of great importance, as it changes along the length of the weld seam due to the different thermal cycles to which the material is subjected. Studies have shown that the FCG rate is higher in the HAZ [35,36]. Investigating the mechanical and fatigue properties of the HAZ of a laser weld is a demanding task, due to the narrowness and heterogeneity of the region [37].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Computational Study of Microhardness Evolution in the HAZ for Al–Cu–Li Alloys

Maritsa,

Deligiannis,

Tsakiridis

et al. 2024

Crystals

View full text Add to dashboard Cite

The Laser Beam Welding (LBW) of aluminum alloys has attracted significant interest from industrial sectors, including the shipbuilding, automotive and aeronautics industries, as it expects to contribute to significant cost reduction associated with the production of high-quality welds. To comprehend the behavior of welded structures in regard to their damage tolerance, the application of fracture mechanics serves as the instrumental tool. However, the methods employed overlook the changes in the microstructure within the Heat-Affected Zone (HAZ), which leads to the degradation of the mechanical properties of the material. The purpose of this study is to simulate microhardness evolution in the HAZ of AA2198-T351 LBW. The material represents the latest generation of Al-Cu-Li alloys, which exhibit improved mechanical properties, enhanced damage tolerance behavior, lower density and better corrosion and fatigue crack growth resistance than conventional Al-Cu alloys. In this work, the microhardness profile of LBW AA2198 was measured, and subsequently, through isothermal heat treatments on samples, the microhardness values of the HAZ were replicated. The conditions of the heat treatments (T, t) were selected in line with the thermal cycles that each area of the HAZ experienced during welding. ThermoCalc and DICTRA were employed in order to identify the strengthening precipitates and their evolution (dissolution and coarsening) during the weld thermal cycle. The microstructure of the heat-treated samples was studied employing LOM and TEM, and the strengthening precipitates and their characteristics (volume fraction and size) were defined and correlated to the calculations and the experimental conditions employed during welding. The main conclusion of this study is that it is feasible to imitate the microstructure evolution within the HAZ through the implementation of isothermal heat treatments. This implies that it is possible to fabricate samples for fatigue crack growth tests, enabling the experimental examination of the damage tolerance behavior in welded structures.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental and Computational Study of Microhardness Evolution in the HAZ for Al–Cu–Li Alloys

Maritsa,

Deligiannis,

Tsakiridis

et al. 2024

Crystals

View full text Add to dashboard Cite

show abstract

“…Kuts [7] and Delkhosh [8] established a crack growth calculation model based on the finite element method and Paris' law, and investigated the impact of various welding parameters on the fatigue intensity. Some scholars have investigated the crack extension mechanism in depth from a microscopic perspective to reveal the damage development pattern of welded joints [9,10]. However, it has been difficult to perform microscopic analyses to provide intuitive conclusions regarding fatigue performance.…”

Section: Introductionmentioning

confidence: 99%

Crack extension analysis and fatigue life assessment of single lug and yoke joints containing initial defects

Duan

Cheng

et al. 2022

Mater. Res. Express

View full text Add to dashboard Cite

To investigate the impact of initial cracks on the fatigue performance of single lug and yoke joints, fatigue testing was performed for defective welding joint models. The crack extension behaviors were investigated based on the theories of fracture mechanics using ANSYS-FRANC3D interactive technology, and the effects of the initial crack location, morphology pattern, and surface angle on fatigue performance were determined. The results showed a fatigue failure mode in which the crack extended along the welding line for single lug and yoke joints. The fatigue life was shorter when the initial crack was in the corner of the single lug plate. Moreover, the crack growth rates during the early stage of crack extension varied significantly with different initial crack morphology patterns. However, the crack growth rates during the later stages were similar to one another. The remaining fatigue life increased with the shape ratio for the same crack depth. Finally, the crack growth rate was the fastest, and the remaining fatigue life was the shortest when the initial crack surface angle was inclined toward the stress concentration area.

show abstract

“…So far, much work has been performed to investigate the microstructures and tensile properties [ 3 , 4 , 5 , 6 ], reheat cracking behavior [ 7 , 8 ], fatigue behavior [ 9 , 10 ], and hydrogen-induced damage at high temperature [ 11 ] of 2.25Cr1Mo0.25V steel. For instance, Fu et al [ 4 ] and Jiang et al [ 5 ] investigated the influences of different heat treatment processes on the microstructure and mechanical responses of 2.25Cr1Mo0.25V steel.…”

Section: Introductionmentioning

confidence: 99%

“…Their results showed that the weld metal exhibited higher strength but lower toughness than the parent metal, which may be due to the presence of more carbides and inclusions in weld. Our recent work investigated the fatigue crack growth behaviors of different zones (i.e., parent metal, heat affected zone, and weld metal) in an as-received 2.25Cr1Mo0.25V steel weldment [ 10 ]. The results showed that the heat-affected zone exhibited a higher fatigue crack growth rate due to non-uniform microstructure with coarse grains, whereas the parent metal showed superior fatigue resistance.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Tensile and Creep Behavior in a CrMoV Steel and Weld Metal

et al. 2021

Self Cite

View full text Add to dashboard Cite

The 2.25Cr1Mo0.25V steel is a vanadium-modified 2.25Cr1Mo steel and is being widely used in the manufacture of heavy-wall hydrogenation reactors in petrochemical plants. However, the harsh service environment requires a thorough understanding of high-temperature tensile and creep behaviors of 2.25Cr1Mo0.25V steel and its weld for ensuring the safety and reliability of hydrogenation reactors. In this work, the high-temperature tensile and creep behaviors of base metal (BM) and weld metal (WM) in a 2.25Cr1Mo0.25V steel weldment used for a hydrogenation reactor were studied experimentally, paying special attention to its service temperature range of 350–500 °C. The uniaxial tensile tests under different temperatures show that the WM has higher strength and lower ductility than those of BM, due to the finer grain size in the WM. At the same time, the short-term creep tests at 550 °C reveal that the WM has a higher creep resistance than that of BM. Moreover, the creep damage mechanisms were clarified by observing the fracture surface and microstructures of crept specimens with the aid of scanning electron microscopy (SEM). The results showed that the creep damage mechanisms of both BM and WM are the initiation and growth of creep cavities at the second phase particles. Results from this work indicate that the mismatch in the high-temperature tensile strength, ductility, and creep deformation rate in 2.25Cr1Mo0.25V steel weldment needs to be considered for the design and integrity assessment of hydrogenation reactors.

show abstract

Experimental Investigation of Fatigue Crack Growth Behavior of the 2.25Cr1Mo0.25V Steel Welded Joint Used in Hydrogenation Reactors

Cited by 7 publications

References 43 publications

Experimental and Computational Study of Microhardness Evolution in the HAZ for Al–Cu–Li Alloys

Experimental and Computational Study of Microhardness Evolution in the HAZ for Al–Cu–Li Alloys

Crack extension analysis and fatigue life assessment of single lug and yoke joints containing initial defects

High-Temperature Tensile and Creep Behavior in a CrMoV Steel and Weld Metal

Contact Info

Product

Resources

About