Microstructure evolution during friction stir welding of 1Cr11Ni2W2MoV martensitic stainless steel at different tool rotation rates

Ragab, Mohamed; Hong, Liu; Ahmed, Mohamed M. Z.; Yang, Guan-Jun; Lou, Zheng-Ji; Mehboob, Ghazanfar

doi:10.1016/j.matchar.2021.111561

Cited by 10 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the heat input varied greatly under different parameters, the minimum microhardness value of HAZ was between 280-300 HV. Mohamed Ragab et al [41] reported a similar phenomenon the FSW study of martensitic stainless steel, and indicated that the similar average microhardness values in HAZ at various tool rotation rates was attributed to the small difference in the peak temperatures therein.…”

Section: Affected Zonementioning

confidence: 59%

“…Although the heat input varied greatly under different parameters, the minimum microhardness value of HAZ was between 280-300 HV. Mohamed Ragab et al [41] reported a similar phenomenon in the FSW study of martensitic stainless steel, and indicated that the similar average For the 200 rpm, 400 rpm, and 600 rpm joints, the profile of the microhardness distribution were similar, which have a "W" shape. Figure 15d shows that SZ had the highest microhardness compared with other specific zones.…”

Section: Affected Zonementioning

confidence: 68%

See 1 more Smart Citation

Microstructure and Mechanical Properties of Friction Stir Welded DP1180 Steel Plates

Zhao,

Li,

Wang

et al. 2023

Metals

View full text Add to dashboard Cite

The effect of rotation speeds from 100 to 600 rpm on the microstructure and mechanical properties of friction stir welded (FSW) DP1180 steel joints was studied. The microstructure in the different weld zones were examined using optical microscopy (OM), scanning electron microscopy (SEM), electron backscattering diffraction (EBSD), and transmission electron microscope (TEM). It was found that when welded at 100 rpm, there was an obvious boundary formed in the middle of the stir zone (SZ), which divided the SZ into two parts, namely, SZ-Ⅰ and SZ-Ⅱ. Significantly refined microstructures with an average grain size of 0.41 μm and 0.28 μm were observed in SZ-Ⅰ and SZ-Ⅱ, respectively. The SZs were mainly composed of martensite when the rotation speed increased over 200 rpm. The thermo-mechanically affected zone (TMAZ) of all joints was composed of martensite and ferrite. Microhardness tests showed that the minimum microhardness of heat affected zone (HAZ) of all joints was between 280–300 HV. It was revealed that as the rotation speed increased, the tensile strength of the joint decreased. The tensile strength of the 100 rpm joint was the highest, reaching 1094 MPa. The fracture position of the 100 rpm joint was in SZ while the fracture positions of the other joints were in HAZ.

show abstract

Section: Affected Zonementioning

confidence: 59%

“…Although the heat input varied greatly under different parameters, the minimum microhardness value of HAZ was between 280-300 HV. Mohamed Ragab et al [41] reported a similar phenomenon in the FSW study of martensitic stainless steel, and indicated that the similar average For the 200 rpm, 400 rpm, and 600 rpm joints, the profile of the microhardness distribution were similar, which have a "W" shape. Figure 15d shows that SZ had the highest microhardness compared with other specific zones.…”

Section: Affected Zonementioning

confidence: 68%

Microstructure and Mechanical Properties of Friction Stir Welded DP1180 Steel Plates

Zhao,

Li,

Wang

et al. 2023

Metals

View full text Add to dashboard Cite

show abstract

“…It should be mentioned that only the maximum, minimum and mean values under each load are digitized for the hardness data (h, H) on the six BCC steels. The 10 BCC steels consist of up to two metallurgical structures (one of them is ferrite), in which Grade 91 10A and 10B steels consist mainly of martensite and a little ferrite [26,27], the high carbon steel with 0.71% C consists of spheroids cementite and ferrite [28], and the other seven steels consist of pearlite and ferrite.…”

Section: Experimental Datamentioning

confidence: 99%

Microhardness Variation with Indentation Depth for Body-Centered Cubic Steels Pertinent to Grain Size and Ferrite Content

Xu,

Song,

et al. 2024

Materials

View full text Add to dashboard Cite

For a micro-indentation hardness test with non-destructivity, the Nix–Gao model is widely used to describe tested hardness or microhardness variation with an indentation depth induced by indentation size effect, in which tested hardness approaches the macrohardness when the indentation depth is large enough. Based on an analysis of hardness measurements on 10 body-centered cubic steels with diverse microstructure, this paper proposes an analytical relation between microhardness to macrohardness ratio and the indentation depth by explicitly linking characteristic indentation depth (a data-fitting parameter) to grain size and ferrite volume fraction using two different methods. In addition, the normal distribution theory is incorporated to consider the inevitable scatter of identical measurements resulting from material heterogeneity and machining/testing errors. Results show that the proposed model, with 96% reliability, can effectively predict microhardness variation with the indentation depth and its scatter.

show abstract

“…Ragab et al [84,85] carried out the FSW of lap joints between martensitic steel sheets with high strength and a thickness of 3.8 mm. The tool used in the FSW process was made of W-25%Re and had a tapered threaded pin with a length of 2.95 mm and a 3 mm tip pin diameter.…”

Section: Fsw Of Similar Steelsmentioning

confidence: 99%

Review on the Solid-State Welding of Steels: Diffusion Bonding and Friction Stir Welding Processes

Khedr

Hamada

Järvenpää

et al. 2022

Metals

View full text Add to dashboard Cite

Solid-state welding (SSW) is a relatively new technique, and ongoing research is being performed to fulfill new design demands, deal with contemporary material advancements, and overcome welding defects associated with traditional welding techniques. This work provides an in-depth examination of the advancements in the solid-state welding of steels through diffusion bonding (DB) and friction stir welding (FSW). Considerable attention was given to DB of steel, which overcame the difficulties of segregation, cracking, and distortion stresses that are usually formed in liquid-phase welding techniques. The defects that affected DB included two types: two-dimensional defects of a metallic lattice, i.e., phases and grain boundaries, and three-dimensional defects, i.e., precipitation. FSW, on the other hand, was distinguishable by the use of relatively low heat input when compared to fusion welding processes such as tungsten inert gas (TIG), resulting in the formation of a limited heat-affected zone. Moreover, fine grain structures were formed in the FSW interface because of the stirring tool’s severe plastic deformation, which positively affected the strength, ductility, and toughness of the FSW joints. For instance, higher strength and ductility were reported in joints produced by FSW than in those produced by TIG. Nevertheless, the HAZ width of the specimens welded by FSW was approximately half the value of the HAZ width of the specimens welded by TIG. Some defects associated with FSW related to the diffusion of elements, such as C/Cr atoms, through the weld zone, which affected the local chemical composition due to the formation of rich/depleted regions of the diffused atoms. Moreover, the lack-of-fill defect may exist when inappropriate welding conditions are implemented. On the other hand, the stirring tool was subjected to extensive wear because of the high hardness values, which negatively affected the economical usage of the FSW process. A summary of the results is presented, along with recommendations for future studies aimed at addressing existing difficulties and advancing the solid-state technology for steel.

show abstract

Microstructure evolution during friction stir welding of 1Cr11Ni2W2MoV martensitic stainless steel at different tool rotation rates

Cited by 10 publications

References 30 publications

Microstructure and Mechanical Properties of Friction Stir Welded DP1180 Steel Plates

Microstructure and Mechanical Properties of Friction Stir Welded DP1180 Steel Plates

Microhardness Variation with Indentation Depth for Body-Centered Cubic Steels Pertinent to Grain Size and Ferrite Content

Review on the Solid-State Welding of Steels: Diffusion Bonding and Friction Stir Welding Processes

Contact Info

Product

Resources

About