Effect of Microstructure and Texture on Mechanical Properties of Resistance Spot Welded High Strength Steel 22MnB5 and 5A06 Aluminium Alloy
Round 1
Reviewer 1 Report
This is a very interesting work that fits well within the scope of this Journal. However, some aspects need to be addressed prior to publication of this article. Minor revisions are due.
The author should report the chemical composition in a table.
The authors should report in a table the different sets of parameters used in the experimental work.
The images reported in figure 3 in which cross section of specimen are referred to?
In the caption of figure 3 the authors reported only welding current. Which are other parameters used for this joint?
Moderate proof of English is due.
Author Response
Dear Editor and reviewers，
Thank you very much for the comments about our paper submitted to Metals (No. 519813). We have resubmitted the revised version with the main change highlighted in red according to the answers to the reviewer’s comments. A list of responses to the reviewer 2 is as follows.
Open Review 1
Comments and Suggestions for Authors
This is a very interesting work that fits well within the scope of this Journal. However, some aspects need to be addressed prior to publication of this article. Minor revisions are due.
Reply: Thanks very much. We have revised the manuscript very carefully and all the corrections are highlighted in red.
The author should report the chemical composition in a table.
Reply: Thanks for your suggestion. We have added Table 1 with chemical composition of the BM.
The authors should report in a table the different sets of parameters used in the experimental work.
Reply: Thanks for your suggestion. We have added Table 1 with a set of welding parameters
The images reported in figure 3 in which cross section of specimen are referred to?
Reply: Thanks for your suggestion. The images reported in figure 3 in which cross section of specimen are referred to the normal direction.
In the caption of figure 3 the authors reported only welding current. Which are other parameters used for this joint?
Reply: Thanks for your suggestion. Because microstructure of the NZ, the HAZ and the BM for both Al and steel sides can also be observed from EBSD maps, thus, we reported only the micrographs for welding current of 8kA and welding time of 200ms.
Moderate proof of English is due.
Reply: Thanks for your suggestion, we have corrected the grammar errors very carefully.
Reviewer 2 Report
The article presents the effect of microstructure and texture on
mechanical properties of resistance spot welded high strength steel
22MnB5 and 5A06 aluminium alloy. In my opinion the text is prepared well, however there are some very
important informations that have to be add in the manuscript. I propose
to reconsider in after major revision.
General remarks:
- There are only four references pubished after 2017. In my opinion it is not enough. Please add some latest positions. Please also add some positions from Metals journal.
- Reference 32 - pleasa add year when it was published.
- Reference 47 - please correct the name to: A. Zielińska-Lipiec.
Section "1. Introduction":
This section is well organized. I have small suggestions:
- avoid spaces in brackets, eg. line 34 "[1, 3]".
- line 48, change to [10,11]. The same in other places. When you cited two references one after one, you should use, ",", the "-" should be use, when you cited more than two positions".
Section "2. Materials and methods":
In this section there are areas which must be improved. Couple of very important informations are not presented in the text.
- please present chemical composition of used materials in the table. It will be more readable for potentia readers. Please also add information about these values, are they from standard, analysis or from manufacturer data?
- lines 84-86 - please add info why you used these parameters. Are they come from previous investigation or from literature?
- the quality of Fig. 1 is poor, please change it.
- how many specimens have you prepared? Which specimens have been tested in each of your test? These are very importatnt informations. Please also add the parameters for each specimen. It could be present in the table.
Section "3. Results":
The description of each figure should correspondance more straight to the figure. Please rebuilt it in some pleces.
- line 112-113 - please mark NZ in the figure.
- line 114-116 - "The high strength steel and the 5A06 aluminium alloy are difficult to be melted together due to the great difference between the physical properties of steel and that of Al" - please add information what kind of physical properties do you mean, with their values for each of BMs.
- Figure 2 - there are two pictures as a fig a). mark why there are two, and what is the differences between them (material). There are also more pictures than letters.
- Figure 4 - there are three pictures, but you used letters "a", "b" for only two of them.
- Figure 5 - please check this figure, it looks something going wrong during adding it in the text.
- Figure 9 - I can't find letters to each picture, so it is hard to check the description of this figure.
- Figure 13 - there isn't straight info, what does mean colour areas (eg. red, green...).
Sections "4 Discussion" and "5. Conclusions":
These sections are the strongest in your article. The conclusions are conducted with the results. I don't have any suggestions here.
Author Response
Response to reviewer
Dear Editor and reviewers，
Thank you very much for the comments about our paper submitted to Metals (No. 519813). We have resubmitted the revised version with the main change highlighted in red according to the answers to the reviewer’s comments. A list of responses to the reviewer 2 is as follows.
Open Review 2
Comments and Suggestions for Authors
The article presents the effect of microstructure and texture on mechanical properties of resistance spot welded high strength steel 22MnB5 and 5A06 aluminium alloy. In my opinion the text is prepared well, however there are some very important informations that have to be add in the manuscript. I propose to reconsider in after major revision.
Reply: Thanks very much. We have revised the manuscript very carefully and all the corrections are highlighted in red.
General remarks:
- There are only four references published after 2017. In my opinion it is not enough. Please add some latest positions. Please also add some positions from Metals journal.
- Reference 32 - pleasa add year when it was published.
- Reference 47 - please correct the name to: A. Zielińska-Lipiec.
Reply: Thanks for your suggestion. We have corrected the errors in the reference list. We have added four new references for the year 2017 to the year 2019 including three references from Metals journal, and the new references are listed as follows:
Shin S, Park D J, Yu J, et al. Resistance Spot Welding of Aluminum Alloy and Carbon Steel with Spooling Process Tapes. Metals, 2019, 9(4): 410.
Tutar M., Aydin H., Bayram A. Effect of Weld Current on the Microstructure and Mechanical Properties of a Resistance Spot-Welded TWIP Steel Sheet. Metals 2017, 7(12), 519
Qiao Z., Li H., Li L., et al. Microstructure and Properties of Spot Welded Joints of Hot-Stamped Ultra-High Strength Steel Used for Automotive Body Structures. Metals 2019, 9(3), 285.
Anijdan S.H.M., Sabzi M., Ghobeiti-Hasab M., et al. Optimization of spot welding process parameters in dissimilar joint of dual phase steel DP600 and AISI 304 stainless steel to achieve the highest level of shear-tensile strength. Mater. Sci. Eng. A., 2018, 726: 120-125.
Section "1. Introduction":
This section is well organized. I have small suggestions:
- avoid spaces in brackets, eg. line 34 "[1, 3]".
- line 48, change to [10,11]. The same in other places. When you cited two references one after one, you should use, ",", the "-" should be use, when you cited more than two positions".
Reply: Thanks for your suggestion. We have corrected the errors in the introduction part.
Section "2. Materials and methods":
In this section there are areas which must be improved. Couple of very important informations are not presented in the text.
- please present chemical composition of used materials in the table. It will be more readable for potential readers. Please also add information about these values, are they from standard, analysis or from manufacturer data?
Reply: Thanks for your suggestion. We have added Table 1 with chemical composition of the BM, and values for chemical composition of used materials are from standard data.
- lines 84-86 - please add info why you used these parameters. Are they come from previous investigation or from literature?
Reply: Thanks for your suggestion. The welding parameters are chosen based on our previous investigation.
- the quality of Fig. 1 is poor, please change it.
Reply: Thanks for your suggestion. We have revised Figure 1, and it appears much clearer than before.
- how many specimens have you prepared? Which specimens have been tested in each of your test? These are very important informations. Please also add the parameters for each specimen. It could be present in the table.
Reply: Thanks for your suggestion. Roughly forty specimens were prepared. Three tensile samples were tested for each pair of welding parameters, one specimen of each pair of parameters was prepared for optical microscopy and EBSD, respectively.
Section "3. Results":
The description of each figure should correspondance more straight to the figure. Please rebuilt it in some pleces.
- line 112-113 - please mark NZ in the figure.
Reply: Thanks for your suggestion. The sentences describing the NZ have been moved after Figure 2 to make the text much more readable.
- line 114-116 - "The high strength steel and the 5A06 aluminium alloy are difficult to be melted together due to the great difference between the physical properties of steel and that of Al" - please add information what kind of physical properties do you mean, with their values for each of BMs.
Reply: Thanks for your suggestion. Detailed information on physical properties of each of BMs was given in the manuscript.
- Figure 2 - there are two pictures as a fig a). mark why there are two, and what is the differences between them (material). There are also more pictures than letters.
Reply: Thanks for your suggestion. The two pictures marked as a), b), c), d) are from the Al side and the steel side, respectively.
- Figure 4 - there are three pictures, but you used letters "a", "b" for only two of them.
Reply: Thanks for your suggestion. We have corrected the errors.
- Figure 5 - please check this figure, it looks something going wrong during adding it in the text.
Reply: Thanks for your suggestion. We have corrected the errors by making the sentences much clearer. And the coarse BM and the fine BM were superimposed the in Figure 5 a) and b).
- Figure 9 - I can't find letters to each picture, so it is hard to check the description of this figure.
Reply: Thanks for your suggestion. We have corrected the errors by adding more information about the description for the figures. And the coarse BM and the fine BM were superimposed the in Figure 9 a) and b).
- Figure 13 - there isn't straight info, what does mean colour areas (eg. red, green).
Reply: Thanks for your suggestion. We have added the description for blue lines and red lines in Figure 13.
Sections "4 Discussion" and "5. Conclusions":
These sections are the strongest in your article. The conclusions are conducted with the results. I don't have any suggestions here.
Reply: Thanks very much for your comments.
Reviewer 3 Report
The manuscript under evaluation deals with the Effect of microstructure and texture on the mechanical properties of resistance spot welded high strength steel (22MnB5) and the 5A06 Al alloy.
There is an extensive experimental investigation however more work is necessary in order to address the matter in a comprehensive manner.
Some specific comments:
Fig. 2 (page 3 & 4): A scale indicator is needed
Page 3 line118: "The NZs were formed at both sides of high strength steel and aluminium alloy": There is no clear evidence that steel nugget has been formed. Fig. 3 in Page 5 does not clearly support this statement. It seems from Fig. 3 that the weld has rather characteristics of welding-brazing due to the difference in the melting points between steel and the Al alloy.
Page 4, line 124: "Similar to the microstructure of the RSWed similar steel joints" The case here is completely different due to the dissimilar welding and the difference between Steel and Al alloy
Page 14 IMC layer: Despite the fact that the IMC layer is reported in the literature, no reference is made in the section of the microstructure description (Pge 3 3.1. Microstructure in the dissimilar Fe/Al joint). The authors report the The effect of IMCs layer on properties (Page 14, line 283) without any prior discussion on the formation of that layer and how the experimental conditions affect its formation.
The reviewer cannot take the responsibility to recommend publication in the current form.
Author Response
Response to reviewer
Dear Editor and reviewers，
Thank you very much for the comments about our paper submitted to Metals (No. 519813). We have resubmitted the revised version with the main change highlighted in red according to the answers to the reviewer’s comments. A list of responses to the reviewer 3 is as follows.
Open Review 3
The manuscript under evaluation deals with the Effect of microstructure and texture on the mechanical properties of resistance spot welded high strength steel (22MnB5and the 5A06 Al alloy.
There is an extensive experimental investigation however more work is necessary in order to address the matter in a comprehensive manner.
Some specific comments:
Fig. 2 (page 3 & 4): A scale indicator is needed
Page 3 line 118: "The NZs were formed at both sides of high strength steel and aluminium alloy": There is no clear evidence that steel nugget has been formed. Fig. 3 in Page 5 does not clearly support this statement. It seems from Fig. 3 that the weld has rather characteristics of welding-brazing due to the difference in the melting points between steel and the Al alloy.
Reply: Thanks very much for your suggestion. We have corrected the errors by saying that the steel nugget has not been formed and the steel side has rather characteristics of welding-brazing due to the difference in the melting points between steel and the Al alloy.
Page 4, line 124: "Similar to the microstructure of the RSWed similar steel joints". The case here is completely different due to the dissimilar welding and the difference between Steel and Al alloy
Reply: Thanks for your suggestion. We have deleted the text.
Page 14 IMC layer: Despite the fact that the IMC layer is reported in the literature, no reference is made in the section of the microstructure description (Pge 3 3.1. Microstructure in the dissimilar Fe/Al joint). The authors report the effect of IMCs layer on properties (Page 14, line 283) without any prior discussion on the formation of that layer and how the experimental conditions affect its formation.
Reply: Thanks for your suggestion. We have corrected the errors by citing reference and integrating session “4.1 The effect of IMCs layer on properties” into the last dicussion session “The effect of microstructure and texture on mechanical properties”. And we have deleted the discussion on IMCs layer since we have not done any analysis on the formation of that layer and how the experimental conditions affect its formation.
The reviewer cannot take the responsibility to recommend publication in the current form.
Reply: Thanks for your suggestion. We have revised the manuscript very carefully and all the corrections are highlighted in red.
Round 2
Reviewer 2 Report
Dear Authors,
Thank you for your revision. It was made in good way and the manuscript improved a lot. Your efforts are appreciated. In my opinion, the article could be published after small minor revision.
1. Figure 10 - please move letters a, b, c and d. Now the half of the letter is in the picture and a half in the background.
2. Reference 42 - still, there is a mistake in the name of the author. Now is "Zielińskalipiec-Lipiec A.", should be "Zielińska-Lipiec A."
Best regards
Author Response
Dear Editor and reviewers，
Thank you very much for the comments about our paper submitted to Metals (No. 519813). We have resubmitted the revised version with the main change highlighted in red according to the answers to the reviewer’s comments. A list of responses to the reviewer 2 is as follows.
Open Review 2
Comments and Suggestions for Authors
Dear Authors,
Thank you for your revision. It was made in good way and the manuscript improved a lot. Your efforts are appreciated. In my opinion, the article could be published after small minor revision.
1. Figure 10 - please move letters a, b, c and d. Now the half of the letter is in the picture and a half in the background.
Reply: Thanks for your suggestion. We have corrected the errors by shifting the letters a, b, c and d into the left of Figure 10 to be included in the figure.
2. Reference 42 - still, there is a mistake in the name of the author. Now is "Zielińskalipiec-Lipiec A.", should be "Zielińska-Lipiec A."
Best regards
Reply: Thanks for your suggestion. We have corrected the errors.
