Effects of manganese on the microstructures, mechanical properties and deformation characteristics of Cu-29Zn alloy

Imam Basori, Hafsah I. Pratiwi, Bondan T. Sofyan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Citations (Scopus)

Abstract

Deformation characteristics of brass alloy are still under discussion, particularly concerning the critical level of when the change of deformation mechanism occurs. Previous research showed that the addition of Mn on brass alloys resulted in grain refinement and mechanical properties alteration. However, the effects of Mn on the deformation characteristic of brass alloys have not been investigated. In this research, Cu-Zn-xMn alloys were manufactured by gravity casting process using pure Cu and Zn ingots, as well as Mn chips as the feeding materials. Mn addition was varied to 1.26, 3.48, and 5.83 wt.%. As-cast samples were homogenized at 800 oC for 2 h in a muffle furnace. The samples were then cold-rolled with the level of deformation of 20, 40, and 70 %. Samples characterization includes chemical composition analysis, microstructure observation, tensile and hardness testing. The results showed that addition of Mn for 5.83 wt.% and above created β’ phase, which is richer in Mn compare to that in the matrix. This phase segregated in the grain and along the grain boundary with irregular forms. Significant increase in hardness, yield and tensile strengths was observed with addition of Mn. The maximum elongation was achieved by addition of 3.48 wt.% Mn, while further addition tended to decrease it. At 20 % deformation, slip dominated and its density reduced with addition of Mn. When the deformation level increased to 40 %, twinning replaced slip as the predominant mechanism. Twinning density is slightly increase with the presence of Mn. Further deformation at 70 % produced shear bands and flattened the β’ phase. Greater Mn content led to formation of more shear band.

Original languageEnglish
Title of host publicationMaterial Science and Engineering Technology VI - 6th ICMSET 2017
EditorsRamesh K. Agarwal
PublisherTrans Tech Publications Ltd
Pages212-217
Number of pages6
ISBN (Print)9783035712131
DOIs
Publication statusPublished - 1 Jan 2018
Event6th International Conference on Material Science and Engineering Technology, ICMSET 2017 - Seoul, Korea, Republic of
Duration: 20 Oct 201722 Oct 2017

Publication series

NameMaterials Science Forum
Volume917 MSF
ISSN (Print)0255-5476

Conference

Conference6th International Conference on Material Science and Engineering Technology, ICMSET 2017
Country/TerritoryKorea, Republic of
CitySeoul
Period20/10/1722/10/17

Keywords

  • Cold rolling
  • Cu-29Zn
  • Deformation
  • Shear band
  • Slip
  • Twinning

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