摘要
用增量步进试验方法,研究了珠光体和回火索氏体共析轨钢的循环应力-应变行为。结果表明,在试验选定应变范围内,回火索氏体发生循环软化;珠光体表现为软、硬化同时发生。在同类型组织中,低强材料的循环应变性能优于高强材料,而珠光体优于回火索氏体。定义了珠光体组织的临界应变幅,并对临界应变幅随性能的变化规律进行了研究。同时还探讨了循环应力-应变参数与显微组织参数及应变步进增量的关系。
Cyclic stress-strain behavior in pearlitic and tempered sorbitic eutectoid rail steels has been studied by Incremental Step Test technigue. It is shown that tempered sorbite exhibits only cyclic softening and simultirieous cyclic softening and hardening are observed in pearlite throughout the entire range of strain amplitudes investigated. Cyclic stress-strain properties in coase structure and pearlite are better than those in fine structure and tempered sorbite respectively. Critical strain amplitude of pearlite has been defined. The effects of properties on critical strain amplitude, and the relationship between microstructures, incremental step strains and cyclic stress-strain parameters have been investigated.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1991年第3期233-238,共6页
Journal of University of Science and Technology Beijing
关键词
钢
循环应变行为
共折轨钢
循环软
eutectoid rail steel, cyclic stress-strain, cyclic softening and hardening, cyclic strain hardening exponent.
