Ferritic-pearlitic ductile cast irons:is ΔK a useful parameter?
fatigue tests,performing scanning electron microscope (SEM) observations of specimens lateral surfaces during the tests (in situ tests).According to the experimental results,it is evident that graphite nodules damaging micromechanisms cant be merely classified as matrix nodule debonding,but depend on different parameters (e.g.,loading conditions and matrix microstructure).In this work,the influence of microstructure and loading conditions on fatigue crack propagation resistance in DCIs is discussed.On the basis of experimental results,the applicability of ASTM E399 standard on the characterization of fatigue crack propagation resistance in ferritic-pearlitic DCIs is critically analyzed,mainly focusing the stress intensity factor amplitude role.
Fatigue crack propagation Ductile cast irons Damaging micromechanism Stress intensity factor
Francesco Iacoviello Vittorio Di Cocco Alessandra Rossi Mauro Cavallini
Università di Cassino e del Lazio Meridionale,DICeM,via G.Di Biasio 43,03043,Cassino(FR),Italy Università di Roma La Sapienza,DICMA,via Eudossiana 18,Roma,Italy
国际会议
北京
英文
1-9
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）