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RECRYSTALLIZATION-INDUCED PLASTICITY IN 18Ni MARAGING STEEL UNDER ELASTIC STRESS

YIN Zhongda Harbin Institute of Technology , Harbin , China ZHOU Yongkang Shanghai Centrifugal Machinery Research Institute , Shanghai , China YIN Zhongda Faculty of Heat Treatment of Materials , Harbin Institute of Technology , Harbin 150006 , China

金属学报(英文版)

An approach to study the recrystallization-induced plasticity(RIP)phenomenon in the 18Ni maraging steel under the elastic stress has been made by the analysis of dynamic behaviour at elevated temperatures,the phenomenological analysis of dynamic strain feature curves,the confirmation of phase transf...

关键词: elastic stress , null , null , null

IN-SITU OBSERVATION OF THERMAL FATIGUE CRACK GROWTH IN STEEL 3Cr2W8V

LIU Jianhong HE Shiyu YAO Mei Harbin Institute of Technology , Harbin , China lecturer , Depatment of Metallic Materials , Harbin Institute of Technology , Harbin 150006 , China

金属学报(英文版)

The growing process of thermal fatigue cracking,in steel 3Cr2WSV was observed under desk SEM fitted with sell-made minisized device for thermal faligue test.Before the growing of thermal fatigue crack,the main crack tip reveals to blunt firstly,and some holes and uncontinuous microcraeks occur in fr...

关键词: steel 3Cr2W8V , null , null , null

FRACTURE MECHANISM OF PRE-DEFORMATION-AGED Al-2.73Li ALLOY

SUN Dongli YANG Dezhuang LEI Tingquan CUI Yuexian Harbin Institute of Technology , Harbin , China Lecturer , Department of Metallic Materials and Technology , Harbin Institute of Technology , Harbin 150006 , China

金属学报(英文版)

The fracture mechanism of deformation-aged Al-Li alloy was approached by investigating the influence of prior cold deformation on the precipitation kinetics as well as the behaviours of work hardening and fracture for Al-2.73Li alloy.The experimental results show that the work hardening rate and the...

关键词: Al-Li alloy , null , null , null , null

EFFECT OF TENSION CONDITIONS ON SUPERPLASTIC BEHAVIOUR OF AN Al-Li-Cu-Mg-Zr ALLOY

LIU Qing HUANG Xiaoxu YAO Mei YANG Jinfeng Harbin Institute of Technology , Harbin , China Department of Metals and Technology , Harbin Institute of Technology , Harbin 150006 , China

金属学报(英文版)

A much higher elongation of a warm rolled superplastic Al-Li-Cu-Mg-Zr alloy was made under two-stage strain rate tests comparing with the single ones.During initial stage of deformation a deformation-induced continuous recrystallization which converted a subgrain structure into a recrystallized grai...

关键词: Al-Li alloy , null , null , null

SYNTHESIS OF Ni-Mo ALLOYS BY MECHANICAL ALLOYING

LIANG Guoxian WANG Erde HUO Wencan Harbin Institute of Technology , Harbin , China Post Box 435 , Harbin Institute of Technology , Harbin 150006 , China

金属学报(英文版)

Ni_(100-x)Mo_x(x=20,30,38)alloys have been synthesized by mechanical alloying.The structure evolution of powders in mechanical alloying process has been monitored by X-ray diffraction,scanning electron microscopy and transmission electron microscopy analyses.The results show that the Ni_(62)Mo_(38)s...

关键词: mechanical alloying , null , null , null

INFLUENCE OF COMPOSITION AND DISPERSOID ON FATIGUE FRACTURE BEHAVIOUR OF Al-Mg-Si ALLOYS

JIANG Daming HONG Bande LEI Tingquan (T.C.LEI) Harbin Institute of Technology , Harbin , China Lecturer , Analysis and Measurement Center , Harbin Institute of Technology , Harbin 150006

金属学报(英文版)

A study was made of the fatigue fracture behaviour under different aging conditions of two Al-Mg-Si alloys with different chemical compositions and dispersoid contents.The dispersoid phase can alter the mode of the deformation uniformity of alloys.The dispersoid it- self may decohere from the disper...

关键词: AI-Mg-Si alloy , null , null , null

TEM OBSERVATION OF NUCLEATION AND GROWTH OF BORIDE DURING BORONIZATION OF STEEL 20 AND INFLUENCE OF PRIOR DEFORMATION

JIANG Bailing LEI Tingquan LIU Wei CUI Yuexian Harbin Institute of Technology , Harbin , China Dept.of Metallic Materials and Technology , Harbin Institute of Technology , Harbin 150006 , China

金属学报(英文版)

The TEM observation on the single-side thinned specimens was made of the nucleation and growth of boride during boronization for steel 20 and the influence of prior room temperature deformation.The results of X-ray diffraction and electron probe microstructure analysis show that only Fe_2B formed in...

关键词: boronization , null , null , null , null , null

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