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MECHANICAL BEHAVIOUR OF GRAPHITE AND ITS ADJACENT ZONE TO MATRIX INTERFACE IN CAST IRON

HE Zerong JI Song LIN Guoxiong Fuzhou University , Fuzhou , China professor , Department of Mechanical Engineering , Fuzhou University , Fuzhou , 350002 , China

金属学报(英文版)

The micro-processes on tensile deformation and fracture of graphite-matrix interface in cast iron with ferrite matrix under SEM have been observed in situ.It was revealed that the graphite in cast iron would not be regarded as a cavity and not formed yet notch stress concentration.A new explanation ...

关键词: cast iron , null , null

EFFECT OF DYNAMIC STRAIN AGING ON PURE BENDING FATIGUE STRENGTH OF AUSTENITIC STAINLESS STEEL

CHEN Wenzhe QIAN Kuangwu FuZhou University , Fuzhou , Fujian , China Lecturer , Dept.of Mechanical Engineering , Fuzhou University , Fuzhou , Fujian , China

金属学报(英文版)

The effect of various dynamic strain aging(DSA)pre-treatment processes on pure bending fatigue strength of an 18-8 austenitic stainless steel was investigated.The results show that DSA pre-treatment processes increase remarkably the fatigue strength and the strengthening effects increase with increa...

关键词: dynamic strain aging(DSA) , null , null

GRAIN SIZE AND ACTIVATION ENERGY OF SERRATED YIELDING

XIAO Lingang QIAN Kuangwu Fuzhou University , Fuzhou , Fujian , China Correspondent:QIAN Kuangwu Professor , Institute for Materials Research , Fuzhou University Fuzhou , Fujian 350002 , China

金属学报(英文版)

The apparent activation energy of serrated yielding was measured by two different methods for a commercial brass H68.The results showed that the apparent activation energy of serrat- ed yielding measured by a method involving(m+β)values increases with the grain size.In contrast,those measured by ano...

关键词: serrated yielding , null , null , null

EFFECT OF DYNAMIC STRAIN AGING ON LOW CYCLE FATIGUE BEHAVIOUR OF 18-8 AUSTENITIC STAINLESS STEEL

PENG Kaiping CHEN Wenzhe OIAN Kuangwu Fuzhou University , Fuzhou , China teaching assistant , Department of Mechanical Engineering , Fuzhou University , Fuzhou 350002 , China

金属学报(英文版)

Studies were made of the symmetric tensile-compressive low cycle fatigue behaviour and the influence of dynamic strain aging(DSA)pre-treatment of 18-8 austenitic stainless steel. Within the testing amplitude range of strain.±0.5 % to±1.5 %,the three processes of cyclic hardening,cyclic saturation an...

关键词: 18-8 austenitic stainless steel , null , null

FEATURE OF SERRATED YIELDING IN HIGH STRENGTH Al-Zn-Mg-Cu ALLOY

QIAN Kuangwu LI Xiaoqi ZHANG Haoguo Fuzhou University , Fuzhou , Fuiian , China

金属学报(英文版)

The temperature dependence of critical strain for serrated yielding in high strength A1-Zn-Mg-Cu alloy may be divided into two temperature regions.Their temperature coefficients of critical strain will be negative and positive,respectively....

关键词: serrated yielding , null , null , null

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