EFFECT OF PRECIPITATION HARDENING ON SERRATED FLOW CHARACTERISTICS IN AN Al－Li ALLOY

来源期刊：中国有色金属学报(英文版)1994年第2期

论文作者：Zheng Ziqiao Liu Minggui Yin Denfeng Tan Chenyu

文章页码：56 - 60

Key words：serrated flow; strain aging; Al-Li alloys; age hardening

Abstract: The serrated flow characteristics of an 8090 type Al-Li alloy during tensile testing and the effect of age hardening on serrated flow were inverstigated.The results indicated that in the as-quenched and under-aged conditions the serrated flow occurred and in the existence of serratedflow negative strain rate sensitivity was observed.In the peak and over-aged conditions serrationswere not exhibited.In addition,the predeformation prior to aging and the increasLe in strain ratesuppressed the occurrence of serrated flow.The results are discussed in terms of the interactionsof the solute atoms, dislocations and the precipitates with the mobile dislocations.