The Effect of Isothermal Multidirectional Forging on the Microstructure and Properties of Cu–40%Zn–2%Mn Alloy

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The deformation behavior and changes in the microstructure of manganese brass Cu–40%Zn–2%Mn (wt%) during multidirectional isothermal forging (MDF) at temperatures of 400°C and 500°C, which is ~ 50°C lower and higher than the temperature of the β→β' transition, were studied. It has been shown that MDF at both temperatures promotes the formation of a homogeneous and fine-grained structure with an average grain size of α- and β'-phases of ~ 5 and ~ 12 microns, respectively, increasing the hardness by 2.5 times from 130 HV in the initial state to ~ 310 HV after the total true deformation ∑e = 7.2. An increase in the true strain to ∑e = 14.4 did not have an additional strengthening effect. In the case of MDF at 400°C, an increase in the true deformation was accompanied by a slight grinding of the grains of the α and β' phases to 3.6 and 9.2 microns, respectively, and in the case of deformation at 500°C, it led to an increase in their sizes to 7.1 and 17.5 microns, respectively.

作者简介

M. Kishchik

National University of Science and Technology MISIS, Moscow, 119049 Russia

Email: kishchik.ms@misis.ru

A. Kishchik

National University of Science and Technology MISIS, Moscow, 119049 Russia

A. Mochugovskiy

National University of Science and Technology MISIS, Moscow, 119049 Russia

V. Cheverikin

National University of Science and Technology MISIS, Moscow, 119049 Russia

A. Kotov

National University of Science and Technology MISIS, Moscow, 119049 Russia

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