摘要
对正火状态16Mn在二维循环复杂应变路径下的流动特性和强化进行了系统的实验研究对于特定的循环应变路径,当应变幅值较小时,材料多表现为循环弱化;随着应变幅值的增加,循环弱化的现象逐渐消失,在某些路径下甚至表现为循环强化.在非比例循环加载条件下,材料的强化与路径形状密切相关实验表明,应变的幅值和路径方向的变化所造成的强(弱)化间存在耦合。
An experimental investigation was carried out of the flow characteristic and
hardening of normalized steel 16Mn subjected to biaxially nonproportional cyclic straining.
For a fixed cyclic strain path, the steel behaves mainly cyclic softening when the amplitude of
strain is small. While with the increase of strain amplitude, the softening disappears gradually,
and even changes to cyclic hardening for certain strain path. The hardening of the steel may
relate to the shape of strain path under nonproportional cyclic straining. Experimental results
show that there exists a coupling between the hardening/softening induced by strain
amplitude and that by the strain path. The memory of the steel to the history of
nonproportional cyclic hardening and the validity of Lensky's hypothesis of local
determinability were also examined.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第10期A429-A437,共9页
Acta Metallurgica Sinica
关键词
锰钢
16MN钢
塑性
研究
steel 16Mn
nonproportional cyclic straining
plastic flow
hardening
