THE EXPERIMENTAL AND NUMERICAL INVESTIGATION OF TITANIUM ALLOY VT-14 CREEP

Currently, the RFNC-VNIIEF are developing a highly productive multifunctional software complex LOGOS for analyzing problems of strength and heat-and-mass transfer for developing supercomputer technologies of high-tech industries in Russia. One of the promising directions of developing the LOGOS complex is developing a creep module. The paper presents the results of experimentally and numerically analyzing the creep behavior of the VТ-14 titan alloy. The development and software implementation of the algorithms of the mathematical model of thermal creep was done based on the works by S.A. Kapustin. The benchmark results of experimentally studying creep using cylindrical specimens of the VТ-14 titan alloy were obtained in the laboratory of SPTI of NRNU MEPhI. Standard cylindrical specimens were used, that were secured along the fixing part on the one end and loaded with a constant force. The test was controlled and the experimental results were processed using the Autograph TrapeziumX software complex. The numerical studies were done using the LOGOS and UPAKS software complexes. The methods of determining the parameters of material functions based on the experimental results are described. A comparative analysis of the numerical and experimental results on the creep of a cylindrical specimen subjected to constant long loading was done. Creep of the VТ-14 titan alloy was studied at the universal high-precision test machine Shimadzu AG-X having two reassuring channels: for forces and displacements. The material functions of the creep model were determined by the results of the experimental study.