A Study on the Effect of Current Waveform on Intermetallics Formation and the Weldability of Dissimilar Materials Welded Joints (AA5052 Alloy—GI Steel) in AC Pulse GMAW
Round 1
Reviewer 1 Report
The welding of aluminum alloys with steels have been a hot topic in the past two decades in auto industry, and the results presented in this paper can be helpful in guiding the welding process development in the field.
Some revisions are suggested as follows:
- A better schematic diagram of the welding set-up is necessary to show more clearly the important process parameters, such as the tilt angle 15 degrees, which was not shown now.
- The subscripts shoudl be used for the chemical molecules, like Fe3Al, the number 3 should be a subscript.
- The heat treatment conditions of the base materials are necessary, which are critical for both Al alloys and steels.
- Fractography need be carried out to reveal the features of fractures, such as the ductile dimples, porosities on the fractured surface, etc.
Author Response
To whom may concern,
Thank you for reviewing my paper that is “A Study on the Effect of Current Waveform on Intermetallics Formation and the Weldability of Dissimilar Materials Welded Joints (AA5052 alloy - GI steel) in AC Pulse GMAW”.
I received your comments & opinion gladly and have revised the article following your instruction. The changes in revised version were proceeded based on your every comment, and you can check them in the attached file. The changed parts are coloured with blue (contents) and red (subscripts for chemical terms or numeric values). In the same time, the revised parts can be tracked with ‘Track changes’ function (Review -> Track changes).
The new version of this article, which is revised under your comment, is titled as ‘(Rev1) metals-1147850’. Plus, I have answered your comment including your initial letter in below.
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Comments and Suggestions for Authors
The welding of aluminum alloys with steels have been a hot topic in the past two decades in auto industry, and the results presented in this paper can be helpful in guiding the welding process development in the field.
Some revisions are suggested as follows:
1. A better schematic diagram of the welding set-up is necessary to show more clearly the important process parameters, such as the tilt angle 15 degrees, which was not shown now.
Some of schematics were updated with new figures, as focusing on showing experimental conditions more clearly. e.g. Figure 2 was changed to new schematics including magnified torch inclination section and detailed jig positioning for preventing the deformation.
2. The subscripts shoudl be used for the chemical molecules, like Fe3Al, the number 3 should be a subscript.
The words for chemical molecules were corrected as element with subscript. The changed subscripts are colored with red
3. The heat treatment conditions of the base materials are necessary, which are critical for both Al alloys and steels.
The heat treatment condition of the steel is changed to exact name, which is hot-dip galvanized steel. To make that long term be brief, the exact name is described in Introduction & Research Method and Conclusion section but it is replaced to ‘the steel’ in Result Discussion .
4. Fractography need be carried out to reveal the features of fractures, such as the ductile dimples, porosities on the fractured surface, etc.
In tensile-shear strength section, new SEM images of fracture surface is added with showing dimples on the surface to prove of ductile fracture.
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If there is anything that I should know or consider, please let me know.
Best regards,
Seong Min HONG, Shinichi TASHIRO, Hee-Seon BANG, and Manabu TANAKA
Article number : metals-1147850
Author Response File: 
Author Response.pdf
Reviewer 2 Report
My comments are written in the attached document, corresponding to the first version of the paper, with my remarks.
Those aspects to enhance are identified in the text.
The main aspects to enhance are those related to conclusions, because conclusions are not well supported by the results, see attached file.
Comments for author File: Comments.pdf
Author Response
To whom may concern,
Thank you for reviewing my paper that is “A Study on the Effect of Current Waveform on Intermetallics Formation and the Weldability of Dissimilar Materials Welded Joints (AA5052 alloy - GI steel) in AC Pulse GMAW”.
I received your comments & opinion gladly and have revised the article following your instruction. The changes in revised version were proceeded based on your every comment, and you can check them in the attached file. The changed parts are coloured with blue (contents) and red (subscripts for chemical terms or numeric values). In the same time, the revised parts can be tracked with ‘Track changes’ function (Review -> Track changes).
The new version of this article, which is revised under your comment, is titled as ‘(Rev1) metals-1147850’.
If there is anything that I should know or consider, please let me know. Thank you again for your time and reviewing again.
Best regards,
Seong Min HONG, Shinichi TASHIRO, Hee-Seon BANG, and Manabu TANAKA
Article number : metals-1147850
Author Response File: Author Response.pdf
Reviewer 3 Report
I would like to ask the authors to comment on the following remarks:
As the use of AC current in the GMAW method is not standard, it would be appropriate to indicate which welding source was used to produce the samples.
At the same time, it should be clearly stated in the text which welding parameters (and source settings) led to a satisfactory joint quality.
Formal comments:
In Figure 2b) edit the description
The image and the location of its description insert on o the same side (see Fig. 4, 12, 20)
On page 7, the table is incorrectly marked (2 instead of 5) and its description is missing
On page 14, the table (5 instead of 7) is incorrectly marked, including an incorrect reference to the figure (7 instead of 15).
Figure 11i) shows an IMC layer thickness of 5.42 μm, while 3.94 μm is shown in the text.
Check and correct some terms: eg Vickers hardenss test (p. 14)
The text lacks a reference to citation no. 46
In the introduction, a larger number of self-citations is used, which are not directly related to the researched issue.
See page 12 for a reference to Agudo et. al [28], which, however, is not listed in the list of used literature sources (references).
Author Response
To whom may concern,
Thank you for reviewing my paper that is “A Study on the Effect of Current Waveform on Intermetallics Formation and the Weldability of Dissimilar Materials Welded Joints (AA5052 alloy - GI steel) in AC Pulse GMAW”.
I received your comments & opinion gladly and have revised the article following your instruction. The changes in revised version were proceeded based on your every comment, and you can check them in the attached file. The changed parts are coloured with blue (contents) and red (subscripts for chemical terms or numeric values). In the same time, the revised parts can be tracked with ‘Track changes’ function (Review -> Track changes).
The new version of this article, which is revised under your comment, is titled as ‘(Rev1) metals-1147850’. Plus, I have answered your comment including your initial letter in below.
------------------------------------------------------------------------------------
Comments and Suggestions for Authors
I would like to ask the authors to comment on the following remarks:
As the use of AC current in the GMAW method is not standard, it would be appropriate to indicate which welding source was used to produce the samples.
The welding source (welding machine) is corrected in the Research method section with providing the manufacturer and specific product name
At the same time, it should be clearly stated in the text which welding parameters (and source settings) led to a satisfactory joint quality.
A table for welding parameter was corrected by adding more details, e.g. computed/input of heat input for each welding parameter depending on the current and EN ratio.
Formal comments:
In Figure 2b) edit the description
Figure has replaced to new one, which can show the experimental set up more clearly. In addition, the incorrect word, ZIG, was corrected to the proper one (jig)
The image and the location of its description insert on o the same side (see Fig. 4, 12, 20)
The figures that is schematics for the observation locations are corrected to be more clearly seen.
On page 7, the table is incorrectly marked (2 instead of 5) and its description is missing
All table and figure numbers, title, description, and mentions in the paragraphs are corrected. Additionally, some new figures are added or magnified to show more information or prove of discussion
On page 14, the table (5 instead of 7) is incorrectly marked, including an incorrect reference to the figure (7 instead of 15).
As same above, tables and reference are checked and corrected to proper number, name, and format. Furthermore, some of reference were deleted or added to give exact information of this research work
Figure 11i) shows an IMC layer thickness of 5.42 μm, while 3.94 μm is shown in the text.
Incorrectly written context, such as IMC layer thickness, were revised again correcting to exact values. Context in some paragraph were re-arranged to prevent redundant and for discussion.
Check and correct some terms: eg Vickers hardenss test (p. 14)
Incorrectly written words were corrected, especially Vickers hardenss test and SEM EDS analysis.
The text lacks a reference to citation no. 46
As same above, tables and reference are checked and corrected to proper number, name, and format. Furthermore, some of reference were deleted or added to give exact information of this research work
In the introduction, a larger number of self-citations is used, which are not directly related to the researched issue.
Reference are changed and modified to give more related information or discussion of this research work
See page 12 for a reference to Agudo et. al [28], which, however, is not listed in the list of used literature sources (references).
As same above, tables and reference are checked and corrected to proper number, name, and format. Furthermore, some of reference were deleted or added to give exact information of this research work
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If there is anything that I should know or consider, please let me know. Thank you again for your time and reviewing again.
Best regards,
Seong Min HONG, Shinichi TASHIRO, Hee-Seon BANG, and Manabu TANAKA
Article number : metals-1147850
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
Minor corrections should be made, see the attached file.
Comments for author File: Comments.pdf
Author Response
To whom may concern,
Thank you for reviewing again for my article that is “A Study on the Effect of Current Waveform on Intermetallics Formation and the Weldability of Dissimilar Materials Welded Joints (AA5052 alloy - GI steel) in AC Pulse GMAW”.
I checked your comments & opinion carefully and revised under your instruction. This newly revised version followed your every comment, and you can check it in the attached file below. The changed parts are colored with red.
The new version of this article, which is revised under your comment, is titled as ‘(Rev3) metals-1147850’.
If there is anything that I should know or consider, please let me know.
Best regards,
Seong Min HONG, Shinichi TASHIRO, Hee-Seon BANG, and Manabu TANAKA
Article number : metals-1147850
Author Response File: Author Response.pdf
