ABSTRACT
This study was aimed at developing lead-free brass alloys with the goal of substituting lead element with tin. For this purpose, lead-free alloys with tin were developed and the microstructure, hardness and machining behaviour of the Cu–30%Zn alloy was compared with Cu–30%Zn–x%Sn (x = 1.2, 3.2, 5.4, 8, 11.4, 13.9, 17.4). The results showed that the addition of Sn to single-α phase brass led to the formation of duplex (α + β′) brass and then the formation of (β′ + Ɣ ) brass both with increased hardness. In addition, the addition of Sn to Cu–30%Zn alloy led to the decrement of equivalent machining forces (Fm), surface roughness and also the promotion of chip fragmentation due to the formation of the β′ phase, which is an improvement in machinability.
Disclosure statement
No potential conflict of interest was reported by the author(s).
ORCID
Hamid Doostmohammadi http://orcid.org/0000-0003-1779-8728