Microstructure Characterization of Ni-Based Alloys for Packaging Application upon Long-Term Heat Treatment
Round 1
Reviewer 1 Report
I can recommend the publication of the manuscript after the following major comments:
Insert in-text information about the SEM micrographs, such as magnification, acceleration voltage, working distance, and image resolution pixels.
Page 5, lines 117-119: insert more details about “.....the surface morphologies...”. Please, specify the name of the roughness parameter. If possible, insert some height parameters for surface texture, such as: a) Height parameters: Root mean square height Sq [nm]; Skewness Ssk [-]; Kurtosis Sku [-]; Maximum peak height Sp [nm]; Maximum pit height Sv [nm]; Maximum height Sz [nm]; Arithmetic mean height Sa [nm]. b) Surface texture directions: First direction [°]; Second direction [°]; Third direction [°]; Isotropy [%].
Insert more details about the statistical analysis applied.
“Hu [8]...” must be written as ”Hu et al. [8]...” and so on (page 8, lines 160-170).
Page 8, lines 190-191: .”... depicted in Figure 12(a), ...Figure 12(b).”. There is no figure in manuscript 12!
Extend section Conclusions.
Insert for Funding: country.
References are not written according the Guide of Authors (ref. [1], [4], [7], [8], [9], [10], [11], and so on).
If possible, I recommend these references to be cited:
[1] Țălu, Ș. (2015). Micro and nanoscale characterization of three dimensional surfaces. Basics and applications. Napoca Star Publishing House: Cluj-Napoca, Romania (pp. 21-27).
[2] DOI: 10.1007/s10854-016-5268-9.
This paper can be published after the mentioned revisions.
Author Response
Author's Notes to Reviewer-1
Response to the referee;
Thank you very much for your kind and through review of our manuscript.
We revised the manuscript according to your comments.
The revised sentenced in shown in red letters.
Thank you very much.
Kejian Li
I can recommend the publication of the manuscript after the following major comments:
Insert in-text information about the SEM micrographs, such as magnification, acceleration voltage, working distance, and image resolution pixels.
Response: The sentence below is added on line 10 of page 2, Materials and Methods.
The acceleration voltage of SEM image mode was at 5 kV, working distance was 10 mm, magnification ranges from ×100 to ×1000, scale bar was attached to each image, and resolution of image was 640×480 pixels.
Page 5, lines 117-119: insert more details about “.....the surface morphologies...”. Please, specify the name of the roughness parameter. If possible, insert some height parameters for surface texture, such as: a) Height parameters: Root mean square height Sq [nm]; Skewness Ssk [-]; Kurtosis Sku [-]; Maximum peak height Sp [nm]; Maximum pit height Sv [nm]; Maximum height Sz [nm]; Arithmetic mean height Sa [nm]. b) Surface texture directions: First direction [°]; Second direction [°]; Third direction [°]; Isotropy [%].
Response: Thank you for your advice. We think your suggestion is very meaningful. We took a close observation at the corroded surface of our samples. There are some crystallization of corrosion products requires careful analysis. We will study it in detail in the future work. But the key point of this paper is not here, so it will not be shown in this paper.
The sentence and reference below is added on line 3 of page 6:
Crystallization of corrosion products were obviousd, and their roughness parameter and surface texture annlysis [6] will be shown in future work.
[6] Țălu, Ș. (2015). Micro and nanoscale characterization of three dimensional surfaces. Basics and applications. Napoca Star Publishing House: Cluj-Napoca, Romania, 21-27.
Insert more details about the statistical analysis applied.
Response: revised as follows, on line 4 of page 7,
Figure 11 is the result of microhardness measurement. The microhardness test was performed with a load of 200 g and a loading time of 10 s, taken from matrix of each specimen. all tested specimens were metallographically polished and 5-8 points were selected to calculate the average value. It reveals…
“Hu [8]...” must be written as ”Hu et al. [8]...” and so on (page 8, lines 160-170).
Response: revised as follows, in section Discussion.
Hu et al. [9]... line 8.
Lee et al. [11]… line 16
Kim et al. [12]…line 18
Page 8, lines 190-191: .”... depicted in Figure 12(a), ...Figure 12(b).”. There is no figure in manuscript 12!
Response: The Figure 12 below is added.
Figure 12. (a) Stone floor tiles, (b) diagram of crystal.
Extend section Conclusions.
Response: The sentence below is added on line 7 of page 9, Conclusions.
The surface morphologies of the material oxides reveal that the products on the surfaces of the two samples were very continuous and dense, continuously distributed Cr and Nb oxides on the substrate surface.
Insert for Funding: country.
Response: revised as follows:
This research was funded by State Key Laboratory of Vehicle NVH and Safety Technology, grant number NVHSKL-202104, China.
References are not written according the Guide of Authors (ref. [1], [4], [7], [8], [9], [10], [11], and so on).
Response: It has been modified according to your requirements.
If possible, I recommend these references to be cited:
Response: It has been modified according to your requirements in “[6]”.
Reviewer 2 Report
The article is interesting, but there are questions. 1. Why were the temperature 1000 C and exposure 5000 hours taken? What will change with other values? 2. The conclusion regarding the concentration of molybdenum is obvious. 3. Superalloy has the fact that its structural changes depend on many factors, not only those that you saw.
The English grammar is generally correct. However, some sentences are difficult to interpret. Some editing is recommended to improve the fluency of the text as well as punctuation in some places. The preposition "of" must be removed at the end of line 65; there might be other typos.
Author Response
Author's Notes to Reviewer
Response to the referee;
Thank you very much for your kind and through review of our manuscript.
We revised the manuscript according to your comments.
The revised sentenced in shown in red letters.
Thank you very much.
Kejian Li
The article is interesting, but there are questions.
- Why were the temperature 1000 C and exposure 5000 hours taken? What will change with other values?
Response: The tested specimens were heating plates taken from a packaging production line. The actual working time is 7 months (approximately 5000 hours). The operating temperature is 1000 °C.
Revised as follows, on line 4 of page 2, Materials and Methods.
The tested specimens were heating plates taken from a packaging production line, as displayed in Figure 1. The working environment of the tested samples was a temperature of 1000 °C for 7 months (approximately 5000 hours).
- The conclusion regarding the concentration of molybdenum is obvious.
Response: The conclusion revised as follows:
The addition of Mo to Ni-based alloys can significantly improve the high-temperature properties of the material. In this study, the comparison of samples with low (~8 wt.%) and high (~16 wt.%) contents of Mo revealed that the Mo in the material is gathered at the grain boundaries at high temperatures, the concentration of molybdenum is obvious. Continuous precipitates are formed, and grain growth is hindered, which is helpful for improving the thermal stability of the material. The surface morphologies of the material oxides reveal that the products on the surfaces of the two samples were very continuous and dense, continuously distributed Cr and Nb oxides on the substrate surface. The microhardness value of the sample with a high content of Mo was found to decrease less after high-temperature heat treatment, and the thermal stability was superior.
- Superalloy has the fact that its structural changes depend on many factors, not only those that you saw.
Response: Thank you for your advice. We think your suggestion is very meaningful. Superalloy has the fact that its structural changes depend on melting process, alloying elements, working temperatures, and attended times. In this study, the main works is characteristic of grain size and Mo concentration after heat treatment.
Response: The conclusion revised as follows: (in the second paragraph of discussion section)
Superalloy has the fact that its structural changes depend on melting process, alloying elements, working temperatures, and attended times. In this study, the main works is characteristic of grain size and Mo concentration after heat treatment.
The English grammar is generally correct. However, some sentences are difficult to interpret. Some editing is recommended to improve the fluency of the text as well as punctuation in some places. The preposition "of" must be removed at the end of line 65; there might be other typos.
Response: The full text has been carefully read and revised by native English speakers. This part revised as follows:
The present work was to investigate the effects of two kinds of Ni-based alloys. First one with the addition of ~8 wt.% Mo, and ~4 wt.% Nb. The second specimen was ~16 wt.% Mo without Nb contained. They are under long-term heat treatment.
Round 2
Reviewer 1 Report
Accept in present form.
This manuscript is a resubmission of an earlier submission. The following is a list of the peer review reports and author responses from that submission.
