skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Eutectic/eutectoid multi-principle component alloys: A review

Abstract

Multi-principle component alloys (MPCAs) differ from traditional alloys in that they consist of four or more elements or components each with concentrations of 5–35 at. %. Since the first eutectic multi-principle component alloy (MPCA) was produced in 2008, there has been a growing number of papers on developing eutectic MPCAs as potential structural materials. Eutectic MPCAs can show high ambient temperature yield strengths that increase with decreasing interlamellar spacing, λ,according to either λ-1/2 or λ-1, similar to that observed in pearlitic steels, with a tradeoff between this increased strength and reduced tensile ductility. Ambient temperature tensile ductility has been observed in eutectic MPCAs only when one phase is f.c.c. and when the harder second phase is itself deformable. The yield strength in eutectic MPCAs has been shown to decrease with increasing temperature, and, limited data suggest that, this is related to the softening of the harder phase. Annealing of as-cast eutectic MPCAs, which are not typically at equilibrium, can produce precipitation of fine particles that further increase the strength, and which often reduce the ductility. Both thermo-mechanical processing and nitriding can increase the strengths of eutectic MPCAs by transforming the lamellar eutectic into equi-axed grains and producing fine AlN particlesmore » (in aluminum-containing MPCAs), respectively. The properties of eutectic MPCAs can largely be explained by models used for traditional alloys. Finally, while a number of different elements have been used to produce eutectic MPCAs, the design of eutectic MPCAs for structural applications should avoid the use of expensive elements like cobalt and niobium, which have often been used.« less

Authors:
 [1];  [1];  [2]
  1. Dartmouth College, Hanover, NH (United States)
  2. Max Planck Inst. fur Eisenforschung, Dusseldorf (Germany)
Publication Date:
Research Org.:
Dartmouth College, Hanover, NH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1656856
Grant/Contract Number:  
FG02-07ER46392
Resource Type:
Accepted Manuscript
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 147; Journal ID: ISSN 1044-5803
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Baker, Ian, Wu, Margaret, and Wang, Zhangwei. Eutectic/eutectoid multi-principle component alloys: A review. United States: N. p., 2018. Web. doi:10.1016/j.matchar.2018.07.030.
Baker, Ian, Wu, Margaret, & Wang, Zhangwei. Eutectic/eutectoid multi-principle component alloys: A review. United States. doi:10.1016/j.matchar.2018.07.030.
Baker, Ian, Wu, Margaret, and Wang, Zhangwei. Mon . "Eutectic/eutectoid multi-principle component alloys: A review". United States. doi:10.1016/j.matchar.2018.07.030. https://www.osti.gov/servlets/purl/1656856.
@article{osti_1656856,
title = {Eutectic/eutectoid multi-principle component alloys: A review},
author = {Baker, Ian and Wu, Margaret and Wang, Zhangwei},
abstractNote = {Multi-principle component alloys (MPCAs) differ from traditional alloys in that they consist of four or more elements or components each with concentrations of 5–35 at. %. Since the first eutectic multi-principle component alloy (MPCA) was produced in 2008, there has been a growing number of papers on developing eutectic MPCAs as potential structural materials. Eutectic MPCAs can show high ambient temperature yield strengths that increase with decreasing interlamellar spacing, λ,according to either λ-1/2 or λ-1, similar to that observed in pearlitic steels, with a tradeoff between this increased strength and reduced tensile ductility. Ambient temperature tensile ductility has been observed in eutectic MPCAs only when one phase is f.c.c. and when the harder second phase is itself deformable. The yield strength in eutectic MPCAs has been shown to decrease with increasing temperature, and, limited data suggest that, this is related to the softening of the harder phase. Annealing of as-cast eutectic MPCAs, which are not typically at equilibrium, can produce precipitation of fine particles that further increase the strength, and which often reduce the ductility. Both thermo-mechanical processing and nitriding can increase the strengths of eutectic MPCAs by transforming the lamellar eutectic into equi-axed grains and producing fine AlN particles (in aluminum-containing MPCAs), respectively. The properties of eutectic MPCAs can largely be explained by models used for traditional alloys. Finally, while a number of different elements have been used to produce eutectic MPCAs, the design of eutectic MPCAs for structural applications should avoid the use of expensive elements like cobalt and niobium, which have often been used.},
doi = {10.1016/j.matchar.2018.07.030},
journal = {Materials Characterization},
number = ,
volume = 147,
place = {United States},
year = {2018},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

Save / Share: