Application of Laser-Ultrasonics for Evaluating Textures and Anisotropy
Round 1
Reviewer 1 Report
The paper titled “Application of Laser-Ultrasonics for Evaluating Textures and Anisotropy” try to use LUS method to evaluate the texture of the sample. It is a good noncontact method for quality evaluation during the process of the production. The paper is good but there is some information should be declared.
1.It is better to add the results of EBSD of the sample in the paper,
2. the caption of the figure 3 and description of the experimental setup is different. I don’t know which one is correct.
3. the unit of the c11, C12, C44 are missed.
4. the GD should be described at the first using place.
5. the model described in paper are all plate model, but the sample are cylinder ( line 256), why?
6. which kind of the interferometer used in your experiment, and how to get the error below 0.1% for different sample. Is this detected during turning?
7. the paper should be improved in English. such as" This first echo exhibits double or quadruple symmetry as the polar angle is swept 360° Figure 2(a) and (b) respectively" (line 149) and "The lasers were directed to opposite sides of the of the cylinder and the times for the longitudinal wave time of flight (ToF) were measured while the specimen was rotated." (line 140)
Author Response
- Doubtful if this could contribute much to the paper
- I don’t see any difference in these description (?)
- Yes, these should be in GPa
- This is added
- The diameter of a cylinder is effectively the same as a plate thickness so the same conditions apply
- Already added
- The English is essentially correct but the section is shortened which is an improvement
Reviewer 2 Report
The authors investigated the application of a laser ultrasonic technique with a galvanometer to evaluate textures and anisotropic properties of the cold-rolled 316 specimens under various heat-treated conditions. This issue is very important and challenging in various industrial fields and the laser ultrasonic technique with the galvanometer used in this study would be a good tool in the aspect of field application owing to its noncontact capability.
However, the authors should address the following major issues before publication.
- Introduction: What is the novelty and uniqueness of this study? using laser ultrasonics with the galvanometer to measure the anisotropic properties? There are several published papers using laser ultrasonic with the galvanometer to evaluate material properties such as anisotropy. The authors should present the novelty and uniqueness of this study (i.e., scientific contributions) in more detail when compared to the previous techniques.
- Sec.2: please detail the laser ultrasonic system setup with additional Fig. E.g., Which laser is used for ultrasonic generation and detection?
- Sec.2: Please detail the theory of ultrasonic generation and detection mechanisms. E.g., an ablation mode for generation? an interferometric technique for detection?
- Sec.2: Please show the ultrasonic A-scan signal with ultrasonic properties such as a frequency in the manuscript.
- Sec.2 line 141: typo: "opposite sides of the of the cylinder and the times ..."
- Line 177: How to measure the shear wave? In general, the laser ultrasonic detector such as LDV or interferometer can measure only the out-of-plane displacements, i.e., longitudinal wave.
- Fig. 7: Please detail the explanation for Hill Arithmetic and Geometric. Are these values obtained from texture values of the metallographic images such as EBSD? If then the authors should insert the metallographic image in the manuscript.
Author Response
- Reviewer 2 seem to have misunderstood our paper. The reviewer refers to the galvanometer whereas our instrument is a Galvano-mirror which is quite different. The statement that ‘There are several published papers using laser ultrasonic with the galvanometer to evaluate material properties such as anisotropy’ is totally incorrect. This is the first ever description of the use of Galvano-mirrors for this purpose. In fact, this is a very significant ‘first’.
- Regarding the comment about shear waves, these can indeed be generally detected. It is specifically only in-plane waves that create no surface elevation.
- Sec 2, line 141 – This is not a typo, the grammar is correct.
- The calculation procedure of US velocity from texture is a standard as referred to in numerous of the cited references (again, unfamiliarity on the part of the reviewer). It does not require describing again in detail but we have added the relevant source (ref.21) to the text.
- We see no point in including a micrograph from the EBSD data since the application uses individual orientations and not micrographic images. Similarly, yet another A-scan in the literature would contribute nothing new.
Reviewer 3 Report
The manuscript entitled “applsci-1951105” dealing with Application of Laser-Ultrasonics for Evaluating Textures and Anisotropy has been reviewed. The paper has been nicely written but needs significant improvement. Please follow my comments.
1. What is the main contribution of the paper? Please add it to the abstract and the introduction.
2. Please briefly introduce the process in the introduction.
3. Table 1 “Description of samples properties”. Please add a short note on why you presented this information.
4. What is the purpose of presenting figure 1? The quality of (b) is not good.
5. Add more detail to the conclusion and explain how your findings can support the text.
6. The explanation of Figure 12 “The blue square markers represent the longitudinal wave” is not enough.
7. Laser production has many advantages over the conventional manufacturing method which can be highlighted in your paper. Please read the following article and add to the introduction to show the experimental application of laser sintering and the advantage of this process over conventional manufacturing like machining.
Sandwich structure printing of Ti-Ni-Ti by directed energy deposition
Impact of zirconia slurry in steel powder on melt pool characteristics in laser powder bed fusion
Effect of direct aging and annealing on the microstructure and mechanical properties of AlSi10Mg fabricated by selective laser melting
Lightweight design of an AlSi10Mg aviation control stick additively manufactured by laser powder bed fusion
Author Response
- We explain the main contribution in the abstract. ‘ Two new methods are described for measuring anisotropy of P-wave velocity using laser-ultrasonics.’ An introductory sentence has also been added to the text.
- This is already included at the end of the introduction.
- It is standard procedure in materials publications to give details of the materials that are investigated. This is for the benefit of interested readers and requires no justification.
- Figure 1 clarifies the reference axes of the measurements and shows how the specimen looks in reality. We dispute that the quality of this figure is unsatisfactory.
- We consider the conclusions to succinct and accurate. The reader can find further explanation in the previous sections.
- We see no problem in understanding the caption to Fig.12
- This is a disgraceful attempt by the reviewer to attract further citations to his/ her own work. The subject matter of these articles is completely irrelevant to our manuscript.
Pleas see the Revised Manuscript
Round 2
Reviewer 1 Report
The revised paper is good. The manuscript can be acceped after minor modification.
1. it is better if the authors can add ODF figure or polar diagram of sample (one or two) detected by EBSD, it will help the readers to understand well about their research.
2. The "Figure 12" should be figure 12 or Fig.12 (line 302). and also the others, please check.
Author Response
1 ok we have now included two typical polefigures and described the features in the text.
2 according to the MDPI template "All figures and tables should be cited in the main text as Figure 1, Table 1, etc." So we belive it is already correct
Reviewer 2 Report
The paper is ready to publish.
Author Response
ok thanks
Reviewer 3 Report
The paper is ready to publish.
Author Response
Ok thank you
