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Title: Understanding the Cu-Zn brass alloys using a short-range-order cluster model: Significance of specific compositions of industrial alloys

Abstract

Metallic alloys show complex chemistries that are not yet understood so far. It has been widely accepted that behind the composition selection lies a short-range-order mechanism for solid solutions. The present paper addresses this fundamental question by examining the face-centered-cubic Cu-Zn α-brasses. A new structural approach, the cluster-plus-glue-atom model, is introduced, which suits specifically for the description of short-range-order structures in disordered systems. Two types of formulas are pointed out, [Zn-Cu 12]Zn 1~6 and [Zn-Cu 12](Zn,Cu) 6, which explain the α-brasses listed in the American Society for Testing and Materials (ASTM) specifications. In these formulas, the bracketed parts represent the 1 st-neighbor cluster, and each cluster is matched with one to six 2 nd-neighbor Zn atoms or with six mixed (Zn,Cu) atoms. Such a cluster-based formulism describes the 1 st- and 2 nd-neighbor local atomic units where the solute and solvent interactions are ideally satisfied. The Cu-Ni industrial alloys are also explained, thus proving the universality of the cluster-formula approach in understanding the alloy selections. As a result, the revelation of the composition formulas for the Cu-(Zn,Ni) industrial alloys points to the common existence of simple composition rules behind seemingly complex chemistries of industrial alloys, thus offering a fundamental andmore » practical method towards composition interpretations of all kinds of alloys.« less

Authors:
 [1];  [2];  [3];  [4]
  1. Dalian Univ. of Technology, Dalian (China); Sanming Univ., Sanming (China)
  2. Dalian Univ. of Technology, Dalian (China); Univ. of Tennessee, Knoxville, TN (United States)
  3. Dalian Univ. of Technology, Dalian (China)
  4. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Univ. of Tennessee, Knoxville, TN (United States); Univ. of Illinois at Urbana-Champaign, IL (United States); Univ. of Illinois Urbana-Champaign, Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE); USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1222964
Alternate Identifier(s):
OSTI ID: 1222966; OSTI ID: 1224523
Grant/Contract Number:  
FE0008855; FE0011194
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 4; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; atomistic models; metals and alloys; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Cu-ZN brasses; stable solid solution; short-range order; composition; cluster-plus-glue-atom model

Citation Formats

Hong, H. L., Wang, Q., Dong, C., and Liaw, Peter K. Understanding the Cu-Zn brass alloys using a short-range-order cluster model: Significance of specific compositions of industrial alloys. United States: N. p., 2014. Web. doi:10.1038/srep07065.
Hong, H. L., Wang, Q., Dong, C., & Liaw, Peter K. Understanding the Cu-Zn brass alloys using a short-range-order cluster model: Significance of specific compositions of industrial alloys. United States. doi:10.1038/srep07065.
Hong, H. L., Wang, Q., Dong, C., and Liaw, Peter K. Mon . "Understanding the Cu-Zn brass alloys using a short-range-order cluster model: Significance of specific compositions of industrial alloys". United States. doi:10.1038/srep07065. https://www.osti.gov/servlets/purl/1222964.
@article{osti_1222964,
title = {Understanding the Cu-Zn brass alloys using a short-range-order cluster model: Significance of specific compositions of industrial alloys},
author = {Hong, H. L. and Wang, Q. and Dong, C. and Liaw, Peter K.},
abstractNote = {Metallic alloys show complex chemistries that are not yet understood so far. It has been widely accepted that behind the composition selection lies a short-range-order mechanism for solid solutions. The present paper addresses this fundamental question by examining the face-centered-cubic Cu-Zn α-brasses. A new structural approach, the cluster-plus-glue-atom model, is introduced, which suits specifically for the description of short-range-order structures in disordered systems. Two types of formulas are pointed out, [Zn-Cu12]Zn1~6 and [Zn-Cu12](Zn,Cu)6, which explain the α-brasses listed in the American Society for Testing and Materials (ASTM) specifications. In these formulas, the bracketed parts represent the 1st-neighbor cluster, and each cluster is matched with one to six 2nd-neighbor Zn atoms or with six mixed (Zn,Cu) atoms. Such a cluster-based formulism describes the 1st- and 2nd-neighbor local atomic units where the solute and solvent interactions are ideally satisfied. The Cu-Ni industrial alloys are also explained, thus proving the universality of the cluster-formula approach in understanding the alloy selections. As a result, the revelation of the composition formulas for the Cu-(Zn,Ni) industrial alloys points to the common existence of simple composition rules behind seemingly complex chemistries of industrial alloys, thus offering a fundamental and practical method towards composition interpretations of all kinds of alloys.},
doi = {10.1038/srep07065},
journal = {Scientific Reports},
number = ,
volume = 4,
place = {United States},
year = {2014},
month = {11}
}

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