Mechanical response and dislocation substructure of high strength Ni-Cr-Mo steel subjected to impact loading

W. S. Lee, H. F. Lam

研究成果: Conference article同行評審

3 引文 斯高帕斯(Scopus)

摘要

This work focuses on investigating the mechanical response of high strength Ni-Cr-Mo steel (AISI 4340) subject to impact loading, and the relation between its properties and its dislocation substructure. The material was quenched (900°C/30 min.) in oil and then tempered at 550°C for 2 hours to obtain a better tempering martensite structure. The high-strain-rate properties are determined by a series of standard split Hopkinson compression tests at strain rate ranging from 102s-1 to 5 × 104s-1. The influences of the strain rate on the stress-strain characteristics, work hardening and deformation mechanisms are discussed. Parallel with this work, the deformed specimens are studied with transmission electron microscopy techniques to observe the development of a cell structure and measure the dislocation density and cell size. The relationships between dislocation density, flow stress, and strain rate have been described in terms of the dislocation structure observed.

原文English
頁(從 - 到)307-312
頁數6
期刊Journal De Physique. IV : JP
4
發行號8
DOIs
出版狀態Published - 1994
事件Proceedings of the International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading - Oxford, UK
持續時間: 1994 九月 261994 九月 30

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

指紋 深入研究「Mechanical response and dislocation substructure of high strength Ni-Cr-Mo steel subjected to impact loading」主題。共同形成了獨特的指紋。

引用此