Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5456495 | Materials Science and Engineering: A | 2017 | 7 Pages |
Abstract
The phase transformation behaviors, microstructural evolutions and dimension changes of Ni50-xCuxMn50 (x=8, 10, 12) (at%) were investigated. The results show that the phase transformation sequence of Ni50-xCuxMn50 alloys obtained by quenching from 900 °C during heating and cooling is: γ(fcc) â non-martensite L10 phaseâ14M martensiteâB2âγ(fcc). As these alloys are annealed under a variety of temperatures between 500 °C and 900 °C, different microstructural evolutions occur. The interesting changes that occurred during the heating and cooling of the above phase transformation are observed in Ni50-xCuxMn50 alloys. Due to the transformations of non-martensite L10 phaseâ14M martensiteâB2, two consecutive dimension expansions are observed during heating for the alloys quenched from 900 °C. The largest dimension expansion can reach to 2.2% in Ni40Cu10Mn50 alloy. The reversible transformation behaviors of 14M martensiteâB2 and B2âγ result in the reversible dimension changes. During cycling or as the alloys quench from 700 °C, the irreversible phase transformation behaviors and the corresponding dimension changes gradually recede and even disappear.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Shuiyuan Yang, Jialin Wu, Yuding Liu, Rongpei Shi, Cuiping Wang, Xingjun Liu,