Friction Stir Processing of 304L Stainless Steel for Crack Repair

Miles, Morgan P.; Gunter, C.; Liu, F.; Nelson, Tracy W.

doi:10.1007/978-3-319-52383-5_2

Cited by 4 publications

(4 citation statements)

References 18 publications

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“…Friction stir-enabled processes are among the most promising repair approaches for AA 7075, as the solid-state nature avoids hot cracking and high residual stresses while the intensive material flow promotes strong bonding. For example, friction stir welding and friction stir processing can heal surface cracks along the tool path, courtesy of the plastic material flow around the cracks driven by the shoulder rotation and traverse motion [10]. One drawback of these techniques is that they only reallocate the existing material.…”

Section: Introductionmentioning

confidence: 99%

Additive Friction Stir-Enabled Solid-State Additive Manufacturing for the Repair of 7075 Aluminum Alloy

et al. 2019

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The repair of high strength, high performance 7075 aluminum alloy is essential for a broad range of aerospace and defense applications. However, it is challenging to implement it using traditional fusion welding-based approaches, owing to hot cracking and void formation during solidification. Here, the use of an emerging solid-state additive manufacturing technology, additive friction stir deposition, is explored for the repair of volume damages such as through -holes and grooves in 7075 aluminum alloy. Three repair experiments have been conducted: double through-hole filling, single through-hole filling, and long, wide-groove filling. In all experiments, additive friction stir deposition proves to be effective at filling the entire volume. Additionally, sufficient mixing between the deposited material and the side wall of the feature is always observed in the upper portions of the repair. Poor mixing and inadequate repair quality have been observed in deeper portions of the filling in some scenarios. Based on these observations, the advantages and disadvantages of using additive friction stir deposition for repairing volume damages are discussed. High quality and highly flexible repairs are expected with systematic optimization work on process control and repair strategy development in the future.

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Section: Introductionmentioning

confidence: 99%

Additive Friction Stir-Enabled Solid-State Additive Manufacturing for the Repair of 7075 Aluminum Alloy

et al. 2019

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“…They also found a relation between mean misorientations and grain size. Miles et al [33] advocated friction stir processing for the repair of stainless steel reactor components manufactured using conventional fusion welding in the nuclear industry. The conventional fusion welding process results in the development of intergranular cracks in the heat affected zone; on the other hand, friction stir processing may be employed as a crack repair method as it generates a lower peak temperature than fusion welding.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Multi-Pass Friction Stir Processing on the Microstructure Evolution and Mechanical Properties of IS2062 Steel

Raja,

Su,

2024

Metals

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The motive of present work is to explore the variation in the material characteristics of steel upon multi-pass friction stir processing. Steel plates (IS2062) that were 3 mm thick, were subjected to friction stir processing in a multi-pass manner. The selected transverse speed was 150 mm/min, along with a tool rotation of 800 RPM when using a tungsten carbide tool (shoulder diameter—10 mm). Steel plates were processed using the single-pass, double-pass, and triple-pass travel of the rotating tool to observe the impact of multi-pass processing on the properties of steel plates. Multi-pass friction stir processing resulted in a higher micro-hardness of 175 VHN after the second pass, in comparison to the unprocessed metal, which had a micro-hardness of 130 VHN, owing to the collective effect of the plastic flow of the material due to the rotation of the tool and frictional heat, which also leads to grain refinement. The second pass evidenced an average grain size of 22 microns, whereas the unprocessed material had an average grain size of 57 microns. The results of EBSD and SEM characterization showed reasonably improved material properties of the processed work materials.

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“…One of the potential applications of FSP is to generate a microstructure amenable to high strain rate superplasticity. 2 Numerous investigations on the FSP technique have shown particular success in changing the microstructure of the reinforced metal matrix composite materials like aluminium, 3,4 magnesium, 5 stainless steels, 6 titanium 7 and copper. 8 Among the various techniques used to fabricate polymer composites, FSP is noteworthy for producing surface-modified composites with good mechanical properties with structural modifications to improve wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effects of the process parameters on shoulderless friction stir processing on the tribological properties of polylactic acid/basalt composites

Arun,

Prakash

2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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The limitations of traditional metallic biomaterials motivated the development of polymer matrix composites to fabricate various biomedical implants. The wear resistance of the composites can be enhanced by modifying the surface properties, using a surface modification process to increase the components’ lifespan. Friction stir processing (FSP) is one of the best solid-state processing techniques for fabricating polymer composites. In the present study, a new, shoulderless tool has been developed to perform FSP to understand the process parameters’ influence to produce an effective processing zone. It may be called ‘Shoulderless Friction Stir Processing’. Therefore, for this research work, the tool rotational speeds of 500, 600 and 700 rpm and traverse speeds of 10, 15 and 20 mm/min have been selected as the process parameters to conduct the FSP on the developed basalt fibre-reinforced polylactic acid composite materials. The obtained result reveals that the tool rotational speed is the most influencing processing parameter, as it affects the surface of the composite. A high rotational speed leads to a high material removal rate, whereas a low rotational speed leads to the burning of the polymer. In addition, the specific wear rate (SWR) is also found to be minimal for the specimen processed at 600 rpm with 20 mm/min traverse speed compared to the other processing parameters.

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Friction Stir Processing of 304L Stainless Steel for Crack Repair

Cited by 4 publications

References 18 publications

Additive Friction Stir-Enabled Solid-State Additive Manufacturing for the Repair of 7075 Aluminum Alloy

Additive Friction Stir-Enabled Solid-State Additive Manufacturing for the Repair of 7075 Aluminum Alloy

The Influence of Multi-Pass Friction Stir Processing on the Microstructure Evolution and Mechanical Properties of IS2062 Steel

The effects of the process parameters on shoulderless friction stir processing on the tribological properties of polylactic acid/basalt composites

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