Mechanisms of plastic instability and fracture of compressed and tensile tested Mg-Li alloys investigated using the acoustic emission method
作者: A. PawelekA. PiatkowskiW. WajdaW. SkuzaA. TarasekWojciech OzgowiczB. GrzegorczykZ. Ranachowski
作者单位: 1Aleksander Krupkowski Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Cracow, Poland
2Silesian University of Technology, Poland
3Institute of Fundamental Technological Research of the Polish Academy of Sciences, Poland
刊名: Fracture and Structural Integrity, 2016, Vol.10 (35), pp.21 - 30
来源数据库: Gruppo Italiano Frattura
DOI: 10.3221/IGF-ESIS.35.03
关键词: Lightweight AlloysAcoustic EmissionFracturePortevinLe Ch�telier PhenomenonTwinningDislocationsShear Bands
原始语种摘要: The results of the investigation of both mechanical and acoustic emission (AE) behaviors of Mg4Li5Al alloy subjected to compression and tensile tests at room temperature are compared with the test results obtained using the same alloy and loading scheme but at elevated temperatures. The main aim of the paper is to investigate, to determine and to explain the possible influence of factors related with enhanced internal stresses such as: segregation of precipitates along grain boundaries or solute atoms along dislocations (Cottrell atmospheres) or dislocation pile-ups at grain boundaries which create very high stress concentration leading to fracture. The results show that the plastic instabilities are related to the PortevinLe Ch�telier phenomenon (PL effect) and they are correlated with...
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  • plastic 可塑性的
  • tensile 拉的
  • compressed 侧扁的
  • acoustic 声的
  • alloys 多组分胶
  • fracture 断口
  • loading 加负载
  • investigation 研究
  • solute 溶质
  • mechanical 机械的