Бронзи корсона: розрахунок вмісту елементів, розчинених у твердому розчині на основі міді, за даними про політерми електричного опору: Processy litʹâ, 2020, Tom 139, №1, p.54-60

• Date: 2020
• Main Authors: Христенко, В. В., Ушкалова*, О. В., Болобан, Є. О.
• Format: Article
• Language: Ukrainian
• Published: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2020
• Subjects: дисперснозміцнений сплав на основі міді; твердий розчин; зміцнювальна фаза; питомий електричний опір; політерма; лінія сольвус
• Online Access: https://plit-periodical.org.ua/index.php/plit/article/view/108
• Journal Title: Casting Processes

Received 07.11.2019 UDK 669.35:54–14:621.785.78 The task of efficiently assessing of dispersion-strengthened alloys retaining performance temperature limit remains to be of great importance. According to previous investigation results for the dispersion-hardening nickel-silicon bronzes the relationship between copper-based solid solution compositions at various temperatures and alloy specific electrical resistance has been established. In particular, it was found that the K1H3 bronze specific electric resistance linearly depends on the content of elements dissolved in the base and this is confirmed by the values of the pair correlation coefficients between these characteristics, calculated both for individual temperature ranges and for the dependencies as a whole. Based on these data, a method of dispersion-hardening alloys strengthening phases temperature stability assessing by polytherms of electrical resistance has been proposed and experimentally confirmed.For quasi-binary Cu–Ni2Si cross section of Cu–Ni–Si phase diagram system alloys, a model of specific electrical resistance on temperature dependence has been developed. The comparative analysis results indicate of proposed model adequacy. Based on this model, for nickel-silicon bronze K1H3, a procedure for calculating of dissolved elements in copper-based phase content by electrical resistivity temperature dependences data has been developed. It is established that the temperature dependence of K1H3 bronze copper-based solid solution equilibrium composition calculated by experimentally determined specific electrical resistance polytherm is in a good agreement with literature data on coordinates of points that belong to Cu–Ni–Si diagram quasibinary Cu–Ni2Si section solvus line. It is possible in future applying the developed technique to assess of temperature stability of more complex dispersively hardened copper alloys such as Cu–(Fe–Cr–C) and Cu–(Ni–Si)–(Fe–Cr–C) strengthening phases.