Research on Friction Performance of Friction Stir Welding Tools Based on Non-Smooth Structure
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsThe paper investigates the application of a bionically inspired, non-smooth, concave coarse structure on the shoulder of friction stir welding tools. It examines whether this modification of the tool can improve the properties of the welding process.
The introduction and the bibliography adequately reflect the problem statement and the state of the art.
The experimental procedure and results are clearly described.
The graphical data are of good quality and self-explanatory.
Despite the good quality of the work, the following suggestions for correction and improvement should be considered:
- For Table 2: include (wt%) in the table heading and remove the material designation "6061" from the table since it is already mentioned in the heading.
- The value for Al content is given in a Chinese symbols, please use the Latin font instead.
- Figure 2(a): Please also indicate the depth of the pit.
- Figure 3: The scale bars are missing on the images.
- It is unclear how the data for Diagram in Fig 8 were obtained. Specifically, how was the precise determination of weight loss achieved: how were the samples weighed? What equipment was used for this purpose? How was accuracy to four decimal places ensured?
- Statistical evaluation of the measurements: how many measurements were conducted and what is the standard deviation? Please provide these additional details.
- Fig. 9 scale bar is missing
Author Response
The paper investigates the application of a bionically inspired, non-smooth, concave coarse structure on the shoulder of friction stir welding tools. It examines whether this modification of the tool can improve the properties of the welding process.
The introduction and the bibliography adequately reflect the problem statement and the state of the art.
The experimental procedure and results are clearly described.
The graphical data are of good quality and self-explanatory.
Despite the good quality of the work, the following suggestions for correction and improvement should be considered:
Comment 1: For Table 2: include (wt%) in the table heading and remove the material designation "6061" from the table since it is already mentioned in the heading.
Response 1: Modified as required
Comment 2: The value for Al content is given in a Chinese symbols, please use the Latin font instead.
Response 2: Modified as required
Comment 3: Figure 2(a): Please also indicate the depth of the pit.
Response 3: Modified as required
Comment 4: Figure 3: The scale bars are missing on the images.
Response 4: Added in the figure
Comment 5: It is unclear how the data for Diagram in Fig 8 were obtained. Specifically, how was the precise determination of weight loss achieved: how were the samples weighed? What equipment was used for this purpose? How was accuracy to four decimal places ensured?
Response 5: Utilize all welding tools to carry out a practical welding operation spanning a length of 200 meters. Following every 50 meters of welding, remove the aluminum debris from the tool surface and measure its weight using an FA2004N electronic balance. Obtain the average of three measurements for each tool, with a precision of 0.0001g.
Additional explanations have been provided in the text.
Comment 6: Statistical evaluation of the measurements: how many measurements were conducted and what is the standard deviation? Please provide these additional details.
Response 6: The FA2004N electronic balance utilized has a minimum reading of 0.0001g and a repeat accuracy of 0.0001g. The actual deviation for each test is also very small, within ± 0.0002g. Therefore, the data is statistically analyzed by taking the average of three measurements.
Comment 7: Fig. 9 scale bar is missing
Response 7: Added in the figure
Reviewer 2 Report
Comments and Suggestions for AuthorsIn this study, based on the principles of bionics, a bionic non-smooth concave pit structure was fabricated on the shoulder of friction stir welding tools, and the thermal cycle curve, downforce and torque of the tool during the welding process were recorded. This article looks good, but some revisions are needed.
1. It is better to add the exact fields to the previous work. This was done on the basis of references (23-26) using a non-smooth surface structure.
2. “Numerous studies have demonstrated that non-smooth surface structures such as pits exhibit exceptional drag reduction and anti-sticking properties in natural organisms.” Please add a reference here.
3. “Figure 3. Experimental welding tools, (a)c.” This title should be revised.
4. Figure 4. Schematic diagram of comprehensive testing platform. It is better to take a photo of this platform.
5. Line 259 to Line 284, may you give some quantised results?
Author Response
In this study, based on the principles of bionics, a bionic non-smooth concave pit structure was fabricated on the shoulder of friction stir welding tools, and the thermal cycle curve, downforce and torque of the tool during the welding process were recorded. This article looks good, but some revisions are needed.
Comment 1: It is better to add the exact fields to the previous work. This was done on the basis of references (23-26) using a non-smooth surface structure.
Response 1: Modified as required
Comment 2: “Numerous studies have demonstrated that non-smooth surface structures such as pits exhibit exceptional drag reduction and anti-sticking properties in natural organisms.” Please add a reference here.
Response 2: Modified as required
Comment 3: “Figure 3. Experimental welding tools, (a)c.” This title should be revised.
Response 3: There was an error while editing the original text, which has been corrected.
Comment 4: Figure 4. Schematic diagram of comprehensive testing platform. It is better to take a photo of this platform.
Response 4: Added in the figure
Comment 5: Line 259 to Line 284, may you give some quantised results?
Response5: This section examines the adhesion performance of various tools with different pit structures on aluminum during welding. It primarily focuses on describing the morphology observed in SEM images and introduces a quantitative metric for the percentage of pits filled with aluminum.
Round 2
Reviewer 2 Report
Comments and Suggestions for AuthorsI guess this article can be accepted in its current form.
