On the Microstructure Development under Cyclic Temperature Conditions during WAAM of Microalloyed Steels

Round 1

Reviewer 1 Report

This paper investigated the phase transformation of three different alloys during heating circles. The following points need to be properly addressed before the paper can be accepted.

1. How many hardness tests were carried out for each sample?

2. The scale bar in figure 7 is missing.

3. There are some typos in the manuscript, e.g. the title of section 3.1 Microstructure charachtersitics should be Microstructure characteristics.

Author Response

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Reviewer 2 Report

• This paper carried out experimental work on three different microalloyed steels. They were subjected to different exemplary thermal cycles in dilatometer. The dependence of the microstructure development on the alloying composition and thermal-cycling parameters during WAAM was enlightened. Although thorough experimental results were presented, this paper needs to be more innovative. More theoretical analysis is needed to support the conclusions. 

Author Response

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Reviewer 3 Report

1. Clearify the features by which the classification of structural components was carried out and include it in the section "Microstructural investigations".

2. The article shows only the size of ferritic grains. Clarify the important role of these ferritic grains. Present the size of the primary austenitic grains in the investigated materials and include them in the results. 

3. There is no detailed description of the influence of structural characteristics on the toughness: type of structural components and structural boundaries, size of inclusions and precipitations, content of impurities and etc. It is necessary to describe or refer to the literature data.

Author Response

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