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ArticleName Effect of quenching temperature on the structure formation, liquation processes, microhardness of structural constituents and hardness of alloy AM4.5Cd modified with cerium
DOI 10.17580/tsm.2024.05.06
ArticleAuthor Slavinskaya N. A., Ri H., Ri E. H., Zhivetev A. S.

Pacific National University, Khabarovsk, Russia

N. A. Slavinskaya, Lecturer of Higher School of Industrial Engineering, Polytechnic Institute, e-mail:
H. Ri, Professor of Higher School of Industrial Engineering, Polytechnic Institute, Doctor of Technical Sciences, e-mail:
E. Н. Ri, Head of Higher School of Industrial Engineering, Polytechnic Institute, Doctor of Technical Sciences, Professor, e-mail:
A. S. Zhivetev, Associate Professor of Higher School of Industrial Engineering, Polytechnic Institute, Candidate of Technical Sciences, e-mail:


The paper presents the studies on the effect of quenching temperature during artificial aging (at 155 oС and holding time of 4 h) on the structure formation, character of the distribution of elements in structural constituents and their microhardness, hardness of alloy AM4.5Cd modified with cerium (0.2 % (wt.)). The authors have determined that higher quenching temperature and subsequent artificial aging contributed to coarsening of structural constituents: α-solid solution, intermetallic phases and eutectics. Electron microscopy and X-ray microanalysis methods were applied to identify structures at various quenching temperatures. Content of copper and manganese varies unevenly. The analysis showed two types of α-solid solutions (α1 and α2) with different chemical compositions. Content of Cu and Mn, % (at.): 2.0 Cu and 0.25 Mn in α1-solid solution shows no changes up to a quenching temperature of 585 oС, solubility of alloying elements in α2-solid solution varies according to the extremal dependence, demonstrating maximum values of copper (3.5 % (at.)) and manganese (3.5 % (at.)) at a quenching temperature of 565 oС. Every value of quenching temperature (535, 545, 565, 585, and 605 oС, respectively) was attributed to intermetallic phases of certain stoichiometry, mostly aluminides of titanium AlxTiyiCezCdvCuw and copper AlxCuyMnzCdv. The authors identified relations between compositions of α-solid solutions, intermetallic compounds and their microhardness, and quenching temperature. Thus, an increase in quenching temperature to 545 oС contributes to an increase in hardness of alloy AM4.5Cd + 0.2 % (wt.) Ce to 104 HB, and a sharp decrease to 60 HB at 605 oС.

keywords Aluminum alloys, АМ4.5Cd, modifying, quenching, ageing, aluminides, hardness, microhardness

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