High Temperature Mechanical Behavior of 16Mnq Under Constant Constraint Conditions
Welding technology is a main processing way in the manufacture of steel bridges. Welding deformation is one of the main influencing factors on the quality of steel bridges, which relates to the effect of material mechanical behaviors and welding techniques. The welding distortion is considered to be a result from the inherent strain after welded. Such an inherent strain from the welding process is primarily determined according to the highest temperature reached and the constraint at each point. In engineering, 16Mnq is a common structural steel used in railway steel bridges. Thus, the paper addresses the high-temperature mechanical behavior of 16Mnq through series experiments under various highest temperature and constant constraint conditions. The thermo-mechanical simulation equipment Gleeble 1500D was used for investigating thermal-constraint coupling behaviors and the thermal expansion apparatus DILPC602 was used for the material linear expansion coefficient. Relationships between temperature, constraint and strain under high temperature were discussed． Results showed that the yielding phenomenon based on high temperature occurs under a certain condition of both constraint and temperature, this phenomenon is sure to affect the inherent strain of material. These researches are significant to understand thermal-mechanical behavior of material and to predict the inherent strain under constant constraint conditions during heat circulates of welding. The paper has supplied the fundamental material data for the practical welding processing simulation.
Thermo-Mechanical Behavior Inherent Strain 16Mnq
GAO Yi ZENG Pan
Key Lab.Of Advanced Materials Processing Technology, Ministry of Education Dept.of Mechanical Engineering, Tsinghua University, Beijing 100084, China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）