Evaluations of residual stresses in repair welding of Ni-based IN939 superalloy

Moattari, Mastaneh; Shokrieh, M.M.; Moshayedi, Hessamoddin; Kazempour-Liasi, H.

doi:10.1080/01495739.2020.1751759

Cited by 14 publications

(6 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The tensile property of SJTU-1 alloy used at 815 • C was performed and a further comparison was obtained from Figure 3. It turned out that the tensile strength is approximately 810 MPa and the elongation exceeds 10% at 850 • C, which is far overweight that of IN939 reported in [18,19]. Additionally, as the strain increased, the stress reached the yield point.…”

Section: Stress-strain Curvesmentioning

confidence: 74%

“…The relative creep rate, surface environmental resistance, and other criteria were further used to obtain 842 alternative systems. Finally, one basic composition combination (named at SJTU-1 alloy) was selected and it turned out that the creep properties of the alloys were better than or close to those of IN939 through JMatPro (Sente Software Ltd., Version 7.0.0) calculation and from Moattari [18] and Jahangiri [19].…”

Section: Experimental 21 Materials Design and Its Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

High Temperature Behaviors of a Casting Nickel-Based Superalloy Used for 815 °C

Wang

Chen

et al. 2021

Materials

View full text Add to dashboard Cite

The hot deformation behaviors of the SJTU-1 alloy, the high-throughput scanned casting Nickel-based superalloy, was investigated by compression test in the temperature range of 900 to 1200 °C and strain rate range of 0.1–0.001 s−1. The hot processing map has been constructed with the instability zone. At the beginning of hot deformation, the flow stress moves rapidly to the peak value with the increased strain rates. Meanwhile, the peak stress is decreased with the increased temperature at the same strain rates. However, the peak stress shows the same tendency with the strain rates at the same temperature. The optimum hot deformation condition was determined in the temperature range of 1000–1075 °C, and the strain rate range of 0.005–0.1 s−1. The microstructure investigation indicates the strain rate significantly affects the characteristics of the microstructure. The deformation constitutive equation has also been discussed as well.

show abstract

Section: Stress-strain Curvesmentioning

confidence: 74%

Section: Experimental 21 Materials Design and Its Characterizationmentioning

confidence: 99%

High Temperature Behaviors of a Casting Nickel-Based Superalloy Used for 815 °C

Wang

Chen

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

“…This is also the case for weld repairs, where the procedure is conducted to fix an anomaly created during the manufacturing stage or repair in‐service‐related damages. [ 186 ] Residual stresses induced by repair welding could decrease the average fracture toughness of welded specimens by 40%. [ 187 ] Salerno et al investigated the interaction between the pre‐existing residual stresses with those created during the welding procedure, suggesting that if the study has to do with evaluating the local stress distributions, given the negligible effects of pre‐existing stresses, they can be neglected in welding simulation analyses.…”

Section: Origins and Effectsmentioning

confidence: 99%

Residual Stress in Engineering Materials: A Review

et al. 2021

View full text Add to dashboard Cite

The accurate determination of residual stresses has a crucial role in understanding the complex interactions between microstructure, mechanical state, mode(s) of failure, and structural integrity. Moreover, the residual stress management concept contributes to industrial applications, aiming to improve the product's service performance and life cycle. In this regard, the industry requests rapid, efficient, and modern methods to identify and control the residual stress state. This review article contains three main sections. The first section covers different residual stress determination methods and reports the advancements over the recent decade. The second section includes the role of residual stresses in the performance of a broad range of materials including metallic alloys, polymers, ceramics, composites, and biomaterials. This is presented by classifying different science areas dealing with residual stresses into two main groups, including “origins” and “effects” of residual stresses. The range of topics covered are “welding, machining, curing/cooling, and spray coating processes,” “medical and dental sciences,” and “fatigue and fracture mechanisms.” The third section summarizes various strategies to effectively control residual stresses through different manufacturing procedures. It is hoped that the data provided herein serves as a valuable up‐to‐date reference for engineers and scientists in the field of residual stress.

show abstract

“…The laser melting deposition (LMD) technique is an advanced technique that utilizes laser energy to melt metal powder, enabling the gradual formation of components via layer-bylayer stacking [4,5]. This technique provides the advantages of low heat input and high material availability, as well as the ability to ignore the complexity of structure, which makes it well-suited for repairing damaged blades [6,7].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Microstructure and Mechanical Properties of the Repaired Precipitation-Strengthened Ni-Based Superalloy via Laser Melting Deposition

Yan,

Xue,

et al. 2023

Metals

View full text Add to dashboard Cite

In this study, a typical γ′ phase precipitation-strengthened Ni-based superalloy DZ411 was repaired using an LMD-based repairing technique with an IN738LC superalloy, and crack-free samples were acquired. The mechanical properties and microstructure of different areas inside the repair sample were investigated, including the IN738LC deposit, the DZ411 substrate, and the interface between these two parts. The differences in mechanical properties between different areas were explained via analyzing fractography and KAM maps. It was found that the coarse carbides of the DZ411 substrate might lead to rapid cracking of grain boundaries, resulting in the worst mechanical properties of the DZ411 substrate. The IN738LC deposit demonstrated significantly superior mechanical properties in comparison to the DZ411 substrate. Its tensile strength exceeded that of the substrate by over 250 MPa, while its relative elongation after fracture was twice as great as that of the substrate. The excellent mechanical properties of the IN738LC deposit could be attributed to its fine microstructure, which resisted rapid cracking and generated a large number of GNDs during the plastic deformation process. For the interface between the deposit and substrate, although its hardness before the tensile test was low, it could also generate many GNDs during the plastic deformation process, hence exhibiting commendable mechanical properties. The research results show that using an LMD-based repairing technique with IN738LC superalloy to repair γ′ phase precipitation-strengthened Ni-based superalloy DZ411 is a feasible solution.

show abstract

Evaluations of residual stresses in repair welding of Ni-based IN939 superalloy

Cited by 14 publications

References 23 publications

High Temperature Behaviors of a Casting Nickel-Based Superalloy Used for 815 °C

High Temperature Behaviors of a Casting Nickel-Based Superalloy Used for 815 °C

Residual Stress in Engineering Materials: A Review

Investigation of Microstructure and Mechanical Properties of the Repaired Precipitation-Strengthened Ni-Based Superalloy via Laser Melting Deposition

Contact Info

Product

Resources

About