The Joint Properties of 5754 Aluminium Alloy by Friction Stir Spot Welding
Zhiwu Xu
Round 1
Reviewer 1 Report
In this work, the authors lap welded a Al alloys using FSSW. The microhardness and failure load of the joint were studied. This work need a major revision before it can be considered for publish.
1． The introduction is tediously long and the research purpose of the work is unclear.
2． Does the tool have thread on the pin? Why did the author choose the pin in Fig. 5. A magnified image of the pin should be provided.
3． The author should introduce the principle when they choose the welding parameters.
4． Fig. 7 needs improvement.
5． Commonly speaking, elongation is not taken into consideration for lap joints
6． The scales in Fig. 11 are missing
7． The language of this work needs improvement.
Author Response
Dear Reviewer,
The revisions were made according to your comments. The revision related file is attached.
Best regards,
Hande GÜLER ÖZGÜL, Orhan DEDEOĞLU
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The results obtained are well known and the effect of FSW parameters on the joint capacity and fracture mode were studied by many papers. Furthermore, the authors investigated only THREE configurations. Only a rotational tool has changed, all the rest parameters are constant. So it is too small, also it's not enough to draw the right conclusions on the welding of AA5754 alloy. All three conclusions provided are very well known and obvious.
The novelty of the methodology used in this article must be explained based on the investigations of the other authors.
The manuscript consists a lot of mistakes. The quality of English language style in this paper is not satisfactory. Please carefully proof-read spell check to eliminate grammatical errors. The scientific terminology used must be improved. Below, I listed only main errors.
The quality of this paper is poor and, in the present form, does not fully meet the quality requirements for publication in Journal of Manufacturing and Materials Processing.
MANUSCRIPT MUST BE IMPROVED AND FINAL DECISION SHOULD BE TAKEN BY EDITOR.
The detailed comments:
1. Title: Authors tested one aluminium alloy (AA5754) not "5000 series Aluminium Alloys". The scatter of properties of the all 5000 series of aluminum alloys is very large. So, the title must be corrected.
2. Line 63: "Kaçar, Emre, Demir and Gündüz" should be "Kaçar et al.". See also "Bilici, Bakır, Bozkurt and Çalış" and other references.
3. Line 113. Table 1 presents chemical composition not chemical structure. See also Table 3.
4. Line 156-157. 52-54 HRC in Rockwell scale is "hardness" not "microhardness"!
5. Figure 1: "Isometrik" ??
6. Table 5 does not present any interesting scientific information and in my opinion should be removed.
7. Figure 7. The description of the tensile shear test is described above the figure 7. Considering that this procedure is WELL KNOWN the figure 7 does not provide any new information.
8. How many samples were prepared for each configuration of welding parameters?
9. Caption of the figure 9: The procedure of the measurement of elongation of circular pin tool must be described.
10. Caption of the figure 10: Did the authors measure hardness of the process (!) or the joint material?
11. Notation of numbers in the whole article. The commas must be replaced by dots.
12. In abstract authors says: [...] all of the fractured samples failed by nugget pullout" and "The fractured samples have only a singly type fracture pattern." However, in secion 3.3 says "Generally, three failure modes are observed [...]". This difference must be discussed in this manuscript.
Author Response
Dear Reviewer,
The revisions were made according to your comments. The revision related file is attached.
Best regards,
Hande GÜLER ÖZGÜL, Orhan DEDEOĞLU
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
All the comments have been addressed. My recommendation is accept.
Reviewer 2 Report
The authors have made a substantial contribution to the improvement of the manuscript. The authors incorporated all of my comments. So, I strongly recommend to accept this paper for publication.
