Microstructural, mechanical and acoustic emission-assisted wear characterization of equal channel angular pressed (ECAP) low stacking fault energy brass

A. V. Filippov, S. Yu Tarasov, S. V. Fortuna, O. A. Podgornykh, N. N. Shamarin, V. E. Rubtsov

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Cu-37wt.%Zn brass samples have been ECAP processed using 1, 2, and 3 passes and then characterized using TEM, compression and tensile tests, indentation, scratching, wear with simultaneous monitoring acoustic emission and vibration acceleration. Mechanical tests showed higher mechanical strength, hardness, wear resistance as well as other characteristics of the ECAPed samples. TEM study demonstrated the microstructural evolution of samples after 1-, 2–3 pass ECAP. Structurally inhomogeneous microstructure composed of primary twin stacks and twin-free zones has been obtained after 1-pass ECAP. Further ECAP on these samples allowed revealing two deformation processes such as microtwinning in the twin-free zone and dislocation glide along the primary twin boundaries. The latter increased the inter-twin misorientation and transformed them into misoriented band structures. Wear test results revealed intense adhesion transfer and reduced wear on samples after ECAP. Acoustic emission and vibration acceleration signals have been obtained during wear and then used to characterize the wear mechanism. Primary twinning and microtwinning in the as-received and 1-pass ECAP samples, respectively, was identified by the AE signal median frequency peaks. On the contrary, the median frequency drops corresponded to the subsurface fracture development in 2- and 3-pass ECAP samples.

Original languageEnglish
Pages (from-to)273-285
Number of pages13
JournalTribology International
Volume123
DOIs
Publication statusPublished - 1 Jul 2018

Fingerprint

stacking fault energy
brasses
Stacking faults
acoustic emission
Brass
Acoustic emissions
Wear of materials
Vibrations (mechanical)
sound waves
Transmission electron microscopy
Microstructural evolution
Twinning
Indentation
Band structure
Wear resistance
Strength of materials
transmission electron microscopy
wear tests
compression tests
Compaction

Keywords

  • Acoustic emission
  • Brass
  • Compression
  • ECAP
  • Indentation
  • Microstructure
  • Scratch
  • Vibration
  • Wear

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

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title = "Microstructural, mechanical and acoustic emission-assisted wear characterization of equal channel angular pressed (ECAP) low stacking fault energy brass",
abstract = "Cu-37wt.{\%}Zn brass samples have been ECAP processed using 1, 2, and 3 passes and then characterized using TEM, compression and tensile tests, indentation, scratching, wear with simultaneous monitoring acoustic emission and vibration acceleration. Mechanical tests showed higher mechanical strength, hardness, wear resistance as well as other characteristics of the ECAPed samples. TEM study demonstrated the microstructural evolution of samples after 1-, 2–3 pass ECAP. Structurally inhomogeneous microstructure composed of primary twin stacks and twin-free zones has been obtained after 1-pass ECAP. Further ECAP on these samples allowed revealing two deformation processes such as microtwinning in the twin-free zone and dislocation glide along the primary twin boundaries. The latter increased the inter-twin misorientation and transformed them into misoriented band structures. Wear test results revealed intense adhesion transfer and reduced wear on samples after ECAP. Acoustic emission and vibration acceleration signals have been obtained during wear and then used to characterize the wear mechanism. Primary twinning and microtwinning in the as-received and 1-pass ECAP samples, respectively, was identified by the AE signal median frequency peaks. On the contrary, the median frequency drops corresponded to the subsurface fracture development in 2- and 3-pass ECAP samples.",
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author = "Filippov, {A. V.} and Tarasov, {S. Yu} and Fortuna, {S. V.} and Podgornykh, {O. A.} and Shamarin, {N. N.} and Rubtsov, {V. E.}",
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T1 - Microstructural, mechanical and acoustic emission-assisted wear characterization of equal channel angular pressed (ECAP) low stacking fault energy brass

AU - Filippov, A. V.

AU - Tarasov, S. Yu

AU - Fortuna, S. V.

AU - Podgornykh, O. A.

AU - Shamarin, N. N.

AU - Rubtsov, V. E.

PY - 2018/7/1

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N2 - Cu-37wt.%Zn brass samples have been ECAP processed using 1, 2, and 3 passes and then characterized using TEM, compression and tensile tests, indentation, scratching, wear with simultaneous monitoring acoustic emission and vibration acceleration. Mechanical tests showed higher mechanical strength, hardness, wear resistance as well as other characteristics of the ECAPed samples. TEM study demonstrated the microstructural evolution of samples after 1-, 2–3 pass ECAP. Structurally inhomogeneous microstructure composed of primary twin stacks and twin-free zones has been obtained after 1-pass ECAP. Further ECAP on these samples allowed revealing two deformation processes such as microtwinning in the twin-free zone and dislocation glide along the primary twin boundaries. The latter increased the inter-twin misorientation and transformed them into misoriented band structures. Wear test results revealed intense adhesion transfer and reduced wear on samples after ECAP. Acoustic emission and vibration acceleration signals have been obtained during wear and then used to characterize the wear mechanism. Primary twinning and microtwinning in the as-received and 1-pass ECAP samples, respectively, was identified by the AE signal median frequency peaks. On the contrary, the median frequency drops corresponded to the subsurface fracture development in 2- and 3-pass ECAP samples.

AB - Cu-37wt.%Zn brass samples have been ECAP processed using 1, 2, and 3 passes and then characterized using TEM, compression and tensile tests, indentation, scratching, wear with simultaneous monitoring acoustic emission and vibration acceleration. Mechanical tests showed higher mechanical strength, hardness, wear resistance as well as other characteristics of the ECAPed samples. TEM study demonstrated the microstructural evolution of samples after 1-, 2–3 pass ECAP. Structurally inhomogeneous microstructure composed of primary twin stacks and twin-free zones has been obtained after 1-pass ECAP. Further ECAP on these samples allowed revealing two deformation processes such as microtwinning in the twin-free zone and dislocation glide along the primary twin boundaries. The latter increased the inter-twin misorientation and transformed them into misoriented band structures. Wear test results revealed intense adhesion transfer and reduced wear on samples after ECAP. Acoustic emission and vibration acceleration signals have been obtained during wear and then used to characterize the wear mechanism. Primary twinning and microtwinning in the as-received and 1-pass ECAP samples, respectively, was identified by the AE signal median frequency peaks. On the contrary, the median frequency drops corresponded to the subsurface fracture development in 2- and 3-pass ECAP samples.

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KW - Indentation

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KW - Scratch

KW - Vibration

KW - Wear

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