Analysis of Phase-Specific Strain Pole Figures for Duplex Steels under Elasto-Plastic Uniaxial Tension—Experiment vs. EPSC Modelling
, Florian Loebich 1, Andreas Prahs 1, Hangning Liu 1, Sandra Cabeza 2, Thilo Pirling 2, Michael Hofmann 3 and Jens Gibmeier 1,*Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsThe manuscript presents new original experimental results of neutronographic diffraction strain analyses which were carried out for the duplex stainless steel X2CrNiMoN22-5-3. At room temperature, this steel has nominal phase content close to equal: 50 vol. % ferrite and 50 vol. % austenite. Steels with similar ratios of austenite and ferrite content are of great interest for use in various engineering applications, due to the combination of high strength and good ductility (10%) and corrosion resistance.
Due to differences in the elastic moduli of the crystalline phases of austenite and ferrite, as well as differences in resistance to plastic deformation, predicting the mechanical behavior of the duplex stainless steel is difficult.
The manuscript presents important new results indicating that phase residual stresses increase with growth deformation of duplex steel relative to the initial state. The magnitude of these stresses was determined using the results of neutron diffraction strain measurements. The analysis results showed that the lattice planes of ferrite and austenite in deformed duplex stainless steel and residual stresses are weakly sensitive to the effects of plastic anisotropy.
The manuscript of the article is well structured. The list of references is satisfactory. The conclusions are based on the analysis of the obtained results.
The results presented in the manuscript may be of interest to a wide range of specialists, graduate students and students who study the application of the duplex stainless steel, including off the X2CrNiMoN22-5-3 steel.
The manuscript needs a small addition.
1) Line 147. The indication of the angle value of cut through ODF (as φ2=45°) should be brought to a uniform form.
2) Line 268. It is necessary to explain the designations of parameters N and I<4> in formula 3.
3) Line 175. You should indicate the dimension of the angle χ (radians or degrees).
4) Uniformity should be maintained when discussing results. The text on page 11 indicates (Line 371) χ=0º, but on other pages (Lines 349, 361, 292, 348) the dimension is not indicated.
Author Response
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Reviewer 2 Report
Comments and Suggestions for AuthorsIntroduction: Need to be refined further. Language and motivation are not very clear. Effect of processing on texture can be added as a section. See A. Kumar et al. (Met. Trans., Microstructure and Texture Development during Cold Rolling in UNS S32205 and UNS S32760 Duplex Stainless Steels | Metallurgical and Materials Transactions A (springer.com)). Since the present manuscript deals with deformation, texture and residual stress. This section will be important.
Experimental: How strain pole figures are experimentally calculated should be explained in details? Which method was used? Why stress PF is not obtained? Simulations will give stress not strain. D is not obtained from simulations. EPSC regions, how it was determined?
Results and discussion: Strain pole figure and texture are different? Use proper terminologies. These are recalculated pole figures not strain pole figures. How you generated stress and strain free sample with same orientation distribution?
In the discussion, how lattice strain related to texture is not clear. Also its is too long. It should be separted like results and discussion should be separate.
How lattice strain in each phase varies? See kanjarla et al. (MSEA, Anisotropic work hardening behaviour in duplex stainless steel under uni-axial loading: Interplay between phase morphology and crystallographic texture - ScienceDirect) How does it corelates to the present investigation.
After addressing above major changes, paper can be accepted.
Author Response
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Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
Comments and Suggestions for Authorscan be accepted.
