Microstructure and Mechanical Properties of Cu-Ag-Zr Alloy

Krishna, S. Chenna; Tharian, K. Thomas; Pant, Bhanu; Kottada, Ravi Sankar

doi:10.1007/s11665-013-0659-z

Cited by 29 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1,2 However, the low strength of pure copper is always referred to as the main drawback limiting the suitability as an inner wall material in applications such as thrust chambers and reactors, where a high conductivity coupled with a sufficient strength is required. 7,8 Therefore, several precipitation-strengthened copper alloys were developed by adding minor amounts of elements like Cr, Zr, Nb, and Ag in order to improve the strength without a corresponding loss of conductivity. [9][10][11] The copper alloy CuCrZr represents one of these candidates to satisfy the strength-conductivity trade-off.…”

Section: Introductionmentioning

confidence: 99%

CuCrZr processed by laser powder bed fusion—Processability and influence of heat treatment on electrical conductivity, microstructure and mechanical properties

Wegener

Koopmann

Richter

et al. 2021

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

CuCrZr parts were fabricated by laser beam powder bed fusion (LB‐PBF) technique and subjected to different heat treatments. As a result, four different conditions were considered for further investigations, that is, the as‐built condition, conditions of maximum hardness (MH) and maximum electrical conductivity (MC), and a condition representing a compromise between hardness and conductivity (H&C). Microstructural evolution and performance under monotonic and cyclic loading were studied. Fracture surfaces revealed significant volume fractions of process‐induced defects such as lack‐of‐fusion (LoF) and pores, irrespective of the condition considered. The effect of these defects on the tensile behavior was found to be marginal, whereas the fatigue performance was noticeably affected due to multiple crack nucleation promoted by large LoF defects. Assessment by computed tomography (CT) revealed a strong influence of the geometry and therefore, of the scan path length, on resulting microstructure and defect population eventually rationalizing obvious discrepancies to the initial process parameter and material density optimization study.

show abstract

Section: Introductionmentioning

confidence: 99%

CuCrZr processed by laser powder bed fusion—Processability and influence of heat treatment on electrical conductivity, microstructure and mechanical properties

Wegener

Koopmann

Richter

et al. 2021

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…The Ag in NARloy-Z contributes both SSS in the matrix and PH by forming various reported intermetallic phases with Cu and Zr [20,26]. The Zr, in addition to contributing to Ag’s intermetallic phases, can add SSS or form Cu 4 Zr or Cu 5 Zr precipitates or oxides depending on the processing methods [26,27].…”

Section: Structure Property Correlations Of High-heat-flux Copper Alloysmentioning

confidence: 99%

Copper-based alloys for structural high-heat-flux applications: a review of development, properties, and performance of Cu-rich Cu–Cr–Nb alloys

Minneci

Lass

Bunn

et al. 2020

International Materials Reviews

View full text Add to dashboard Cite

This review examines the development and current state of Cu-rich Cu-Cr-Nb alloys commonly referred to as GRCop or Glenn Research copper alloys with emphasis on Cu-8Cr-4Nb (at%), or GRCop-84, and Cu-4Cr-2Nb, or GRCop-42. Recent additive manufacturing efforts have increased interest in GRCop alloys, and full-scale hardware has been fabricated using AM techniques and practical hot-fire tests have been conducted, but structure-property relationships are still under development. The development, processing, and current microstructure-property relationships of GRCop alloys are reviewed along with comparisons to similar high-heat-flux Cu alloys including NARloy-Z, GlidCop Al-15, AMZIRC, Cu-1Cr-0.1Zr, and Cu-0.9Cr. The review concludes with an assessment of future prospects for GRCop alloys and overview of advantages provided by additive manufacturing.

show abstract

“…Cu-Ag-Zr alloys with low Ag contents have been considered for aerospace application such as the thrust chamber of liquid rocket engine because of their high thermal conductivity [1]. For this application, Ag is considered as a strengthening element, and the addition of Zr enhances the formation of precipitates, which can also improve the strength level of copper alloys [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…NARloy-Z is one such alloy designed to manufacture the combustion chamber liner of liquid rocket engine [4,5]. Some studies have focused on the microstructure evolution and its effect on the mechanical properties of Cu-Ag-Zr alloys [1,6]. Krishna et al [1] observed uniformly distributed ¿ne nanocrystalline Ag precipitates in the NARloy-Z after aging at 723 K. The results of the subsequent tensile test revealed that the yield and ultimate tensile strength of the aged NARloy-Z were increased, indicating the strengthening effect of these precipitates.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies have focused on the microstructure evolution and its effect on the mechanical properties of Cu-Ag-Zr alloys [1,6]. Krishna et al [1] observed uniformly distributed ¿ne nanocrystalline Ag precipitates in the NARloy-Z after aging at 723 K. The results of the subsequent tensile test revealed that the yield and ultimate tensile strength of the aged NARloy-Z were increased, indicating the strengthening effect of these precipitates. However, when tested at elevated temperatures, the ultimate tensile strength of the aged NARloy-Z is lower than that of the solution-treated material.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Precipitation on the Mechanical Response of Cu–3Ag–0.6Zr Alloy during Hot Compression

Zhang

Ren

et al. 2016

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract. Hot compression experiments were conducted on a Cu-Ag-Zr alloy with low Ag content, Cu-3Ag-0.6Zr, to investigate the effect of precipitation on the mechanical response of this alloy. The results show that the stress-strain behavior of Cu-3Ag-0.6Zr alloy is significantly affected by the precipitation. The flow stress of the alloy deformed at temperatures of 623-673 K and a strain rate of 10 -3 s -1 increases due to the occurrence of the continuous and discontinuous precipitation. However, the precipitation process is suppressed with increasing strain rate, resulting in almost identical flow stress of the alloy deformed at different temperatures.

show abstract

Microstructure and Mechanical Properties of Cu-Ag-Zr Alloy

Cited by 29 publications

References 17 publications

CuCrZr processed by laser powder bed fusion—Processability and influence of heat treatment on electrical conductivity, microstructure and mechanical properties

CuCrZr processed by laser powder bed fusion—Processability and influence of heat treatment on electrical conductivity, microstructure and mechanical properties

Copper-based alloys for structural high-heat-flux applications: a review of development, properties, and performance of Cu-rich Cu–Cr–Nb alloys

Effect of Precipitation on the Mechanical Response of Cu–3Ag–0.6Zr Alloy during Hot Compression

Contact Info

Product

Resources

About