Journal article
Corrigendum to “Synchrotron tomographic quantification of the influence of Zn concentration on dendritic growth in Mg-Zn alloys” [Acta Mater. 156 (2018) 287–296]
Acta materialia, Vol.165, pp.751-752
02/15/2019
DOI: 10.1016/j.actamat.2018.11.006
Abstract
In solidification science, the solid-liquid interfacial area density is a key metric that characterizes the overall semi-solid morphology in a general sense. This interfacial area density can be defined in two different ways. The first is the specific interface area Ss, which is defined as the area of the solid-liquid interface A divided by the volume of the enclosed solid volume Vs, i.e. [Formula presented]. As noted by Neumann-Heyme, Eckert, and Beckermann [1], the inverse of the specific interface area can be considered a characteristic length scale of the microstructure. An alternative measure is the interfacial area concentration SV, in which the solid-liquid interface A is divided by the sample volume V that includes both the solid and liquid phases, i.e. [Formula presented]. The two measures of interfacial area density are related as [Formula presented] where gs is the volume fraction of the solid phase. The authors regret that in their recent paper [2], the terms SS and SV were not clearly defined, which resulted in an incorrect use of the Cahn [3] and Rath [4] equation, (Equation (3) in Ref. [2]). to generate Figure 10 of the original manuscript. The revised figure is shown below as Fig. 1. This figure compares the experimentally measured variation in Sv with the prediction given by Eq (3) in Ref. [2]. assuming that [Formula presented] and that K and m are fitting parameters. As can be seen, the model curves are able to match the experimental data. An important outcome is that now the exponent m has a positive value between 0 and 1, matching other studies in this field. In the original manuscript, the exponent m had a negative value. This new figure shows clearly the globular structure of the Mg-25 wt.%Zn solid, having smaller Sv, while that the hyper-branched structure seen at Mg-38 wt.%Zn and the dendritic structure with branched arms at Mg-50 wt.%Zn have a very similar morphological evolution, in a general sense. The error highlighted above did not only occur in Ref. [2], but also in one other of our manuscripts. Fig. 2 is a corrected version of Figure 8b of [5] where we have again assumed that the exponents m and n are equivalent. Again, a much better fit to the data is achieved.
Details
- Title: Subtitle
- Corrigendum to “Synchrotron tomographic quantification of the influence of Zn concentration on dendritic growth in Mg-Zn alloys” [Acta Mater. 156 (2018) 287–296]
- Creators
- A.B Phillion - McMaster UniversitySansan Shuai - Shanghai UniversityEnyu Guo - Dalian University of TechnologyJiang Wang - Shanghai UniversityTao Jing - Tsinghua UniversityZhongming Ren - Shanghai UniversityH Neumann-Heyme - Helmholtz-Zentrum Dresden-RossendorfC Beckermann - University of IowaP.D Lee - Mechanical Engineering, UCL, London, WC1E 7JE, United Kingdom
- Resource Type
- Journal article
- Publication Details
- Acta materialia, Vol.165, pp.751-752
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.actamat.2018.11.006
- ISSN
- 1359-6454
- eISSN
- 1873-2453
- Language
- English
- Date published
- 02/15/2019
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984196633402771
Metrics
5 Record Views