tailieunhanh - Cyclic deformation and stress strain characteristics of 38XH3MфA steel

In this paper, the cyclic plastic behaviors such as cyclic hardening and cyclic creep of special steel garde 38XH3MФА are studied. Tensile test (uniaxial monotonic test) has been conducted to get mechanical properties of the materials. Cyclic deformation tests were carried out for specimens bearing uniaxial load over materials yield limit in cyclic tension-compression with both strain – controlled and stress – controlled methods. | Journal of Science & Technology 130 (2018) 013-016 Cyclic Deformation and Stress-Strain Characteristics of 38XH3MФА Steel Nguyen Van Duong*, Bui Manh Cuong Military Technical Academy - No. 236, Hoang Quoc Viet, Bac Tu Liem, Hanoi, Viet Nam Received: February 01, 2018; Accepted: November 26, 2018 Abstract In this paper, the cyclic plastic behaviors such as cyclic hardening and cyclic creep of special steel garde 38XH3MФА are studied. Tensile test (uniaxial monotonic test) has been conducted to get mechanical properties of the materials. Cyclic deformation tests were carried out for specimens bearing uniaxial load over materials yield limit in cyclic tension-compression with both strain – controlled and stress – controlled methods. The obtained stress – strain loops were used to identify the cyclic hardening parameters, the Bauschinger effect and cyclic creep characteristics of the steel. The experiment results show the good mechanical properties of 38XH3MФА steel and its capabilty to endure cyclic deformation. Keywords: Hardening rule, cyclic hardening, 38XH3MФА steel, Bauschinger effect. 1. Introduction* behavior of the materials that are Bauschinger effect, cyclic hardening and ratcheting or shakedown. 38XH3MФА steel (GOST 4543-71) belongs to a group of special steels that are used for heavy duty or high impact components such as high pressure vessels, gun tube, artillery barrel [1-3]. Normally, with these important components numerical simulation of their mechanical behaviour must be conducted during designing phase. Therefore the hardening rule and hardening parameters need to be provided into the simulation programme [4]. 2. Experiments Sample for experiment is a rounded bar Φ200 mm x 300 mm, provided by factory Z27, Thai Nguyen City. The heat treatment of sample to obtain high strength with good ductility is as follows: quenching from 860 0C in oil plus tempering at 680 0 C for 4 hours. From this, spiecemens were cut for mechnical and chemical composition

• Điện - Điện tử
• Hardening rule
• Uniaxial monotonic test
• Cyclic hardening
• 38XH3MФА steel
• Bauschinger effect
• Cyclic tension compression