Next Article in Journal
Effect of Strain Rate on Compressive Behavior of a Zr-Based Metallic Glass under a Wide Range of Strain Rates
Next Article in Special Issue
Heating Conditions Influence on Solidification of Inconel 625–WC System for Additive Manufacturing
Previous Article in Journal
Radio-Frequency/Microwave Gas Sensors Using Conducting Polymer
Previous Article in Special Issue
Superelastic Behavior of Ti-Nb Alloys Obtained by the Laser Engineered Net Shaping (LENS) Technique
Open AccessArticle

Effect of Heat Treatment on Cr2Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy

State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(12), 2860; https://doi.org/10.3390/ma13122860
Received: 27 April 2020 / Revised: 2 June 2020 / Accepted: 3 June 2020 / Published: 25 June 2020
Achieving a good match between strength and conductivity is a challenge of the development of the high-performance Cu-Cr-Nb alloy for aerospace and fusion energy. The effect of heat treatment on Cr2Nb phase, strength and conductivity of spark plasma sintered (SPSed) Cu-2Cr-1Nb (at%) alloy was investigated. The results illustrated that Cr2Nb phase of Cu-2Cr-1Nb alloy can be regulated by heat treatment, multi-scale Cr2Nb phase with sizes of 0.10–0.50 μm, 30–100 nm and less than 30 nm was obtained, and the strength and conductivity were significantly increased after heat treatment at 500 °C for 2 h, the room temperature tensile strength and conductivity were 332 MPa and 86.7% IACS, 2.5% and 34.8% higher than those of as-SPSed alloy; the tensile strength at 700 °C was 76 MPa. Increasing heat treatment temperature and time, the tensile strength of the alloy was reduced by 1.5%, 4.3% and 12.3% after heat treatment at 500 °C, 700 °C and 950 °C for 72 h. The good match between strength and conductivity of Cu-Cr-Nb alloy was obtained by reducing the content of alloying elements (Cr and Nb) and microstructure regulation. This approach can be used to prepare structural/functional materials with excellent strength and conductivity. View Full-Text
Keywords: Cu-2Cr-1Nb alloy; heat treatment; multi-scale Cr2Nb phase; heat treatment hardening; tensile strength; conductivity Cu-2Cr-1Nb alloy; heat treatment; multi-scale Cr2Nb phase; heat treatment hardening; tensile strength; conductivity
Show Figures

Figure 1

MDPI and ACS Style

Lv, X.; Liu, Z.; Lei, T.; Li, Q.; Ren, Y.; Zhou, X.; Zhang, Z. Effect of Heat Treatment on Cr2Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy. Materials 2020, 13, 2860.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop