The influences of chromium addition and quenching treatment on the mechanical properties and fracture behaviors of diffusion-alloyed powder metal steels

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題The influences of chromium addition and quenching treatment on the mechanical properties and fracture behaviors of diffusion-alloyed powder metal steels
出版類型SCI(Sciences Citation Index)
出版年度2012
AuthorsMing-Wei Wu, M. - W. W., Lung-Chuan Tsao(L. C.Tsao) 曹龍泉, & Shih-YingChang S. - Y. C.
開始頁196
頁數6
出版日期2013 / 3
其他編號0000
中文摘要

The additionofCrandquenchingtreatmenthavebeenfoundtoincreasethetensilestrengthof
diffusion-alloyedpowdermetalsteels.However,theinfluencesofthesetwomethodsontheimpact
toughnessandfracturebehaviorsarestillunclear.Theobjectiveofthisstudywastoclarifytheeffects
of 0.5wt%Crandquenchingtreatmentonthemechanicalpropertiesandfracturebehaviorsof
diffusion-alloyedpowdermetalsteelsundertensileandimpactloadings.
The resultsshowedthattheadditionofCrhelpsstrengthenandhomogenizethesintered
microstructure.Thetensilestrengthisthusimprovedby38%,whiletheimpactenergyisloweredby
15%. Quenchingtreatmentimprovesthetensilestrengthby46%becausemartensiteformsatthe
expenseoflow-strengthpearlite.However,thelossofimpactenergyduetoquenchingtreatmentisas
high as32%.ThesefindingsdemonstratethattheadditionofCrisafeasiblemethodtostrengthen
diffusion-alloyedPMsteelswithoutobviouslysacrificingtoughness.

期刊名稱Materials Science and Engineering: A
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