Surface hardening of an Al-Si-Cu-Ni-Mg aluminum alloy by friction stir processing and T6 heat treatment

Friction stir processing (FSP) and standard hardening T6 heat treatment were applied for local surface hardening of the АК12D aluminum (Al-12.8Si-1.67Cu-1.03Ni-0.84Mg-0.33Mn-0.23Co-0.24Fe) alloy plates obtained by hot-compression at elevated temperature. FSP was carried out by introducing a pin into the bulk of the material, followed by its movement along the surface at a traverse speed of 8 and 16 mm / min, accompanied by rotation of the pin at a speed of 2000 rpm. The effect of FSP parameters and T6 treatment on structure and hardness were investigated. It was established that FSP at 2000 rpm and 8 mm / min speed resulted in the formation of a monolithic and defect-free processing zone. The FSP and T6 treatment led to fragmentation of the primary Si and intermetallic phases and partial dissolution of intermetallic phases in the α-Al solid solution followed by decomposition and the formation of dispersed precipitates. The formation of a quasi-equiaxed fine-grained structure was observed after FSP and T6 heat treatment in the stir zone. The measured Brinell hardness demonstrated an average value of 128 HB after treatment versus 103 HB in the initial state. The work reveals the features of the local surface structure refinement allowing to figure out approaches to the design of constructions with enhanced properties.

Effect of hot working on the microstructure and tensile properties of a novel PM Re-bearing nickel base superalloy

S.K. Mukhtarov, D.A. Karyagin, A.V. Logunov, A.A. Ganeev, R.I. Zainullin, R.V. Shakhov, V.M. Imayev

Microstructure and mechanical behavior at elevated temperatures of a novel nickel base superalloy heavily alloyed with γ' forming and substitution elements

R.I. Zainullin, A.A. Ganeev, R.V. Shakhov, A.V. Logunov, S.K. Mukhtarov, V.M. Imayev

Microstructure and mechanical properties of a heat resistant nickel base superalloy heavily alloyed with substitution elements

V.M. Imayev, S.K. Mukhtarov, A.V. Logunov, A.A. Ganeev, R.V. Shakhov, R.I. Zainullin, N.Y. Parkhimovich, R.M. Imayev

Microstructure and compression properties at 1000 –1200°C of heat resistant nickel base superalloys heavily alloyed with γ'-forming elements

R.I. Zainullin, A.A. Ganeev, R.V. Shakhov, A.V. Logunov, S.K. Mukhtarov, V.M. Imayev

Effect of synthesis temperature on the formation of nickel-copper composite nanoparticles

I.Yu. Isaeva, G.Yu. Ostaeva, E.A. Eliseeva, A. L. Golovin, A. L. Vasiliev

Signs of the presence of an ordered phase in the Cu-5.9 at.% Pd alloy after its long-term annealing at a moderate temperature

O.S. Novikova, A.E. Kostina, E.G. Volkova, Y.A. Salamatov, A.V. Glukhov, A.Y. Volkov, V.V. Marchenkov, V.S. Gaviko, Y.M. Ustyugov

High-temperature heat treatment of hypersonic metallization coatings from pseudoalloy “Fe-Al”

A.N. Grigorchik, E.V. Astrashab, V.A. Kukareko, M.A. Belotserkovsky, A.V. Sosnovsky

The effect of quenching parameters on the structure and properties of radiation-resistant austenitic steel for the VVER core baffle

I.V. Teplukhina, A.S. Tsvetkov, A.V. Kosulnikova

Plasma electrolytic processing of bimetals at the anodic process

D.E. Kaputkin, V.N. Duradji, N.A. Kaputkina

1. Russian Science Foundation - 22-29-01318
2. Ministry of Science and Higher Education of the Russian Federation within the framework of the state task of the USATU of the youth research laboratory «Metals and Alloys under Extreme Impacts» - 075-03-2022-318/1