MAO Weimin ** University of Science and Technology Beijing
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100083
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China.
材料科学技术（英文）
The influence of widening and initial Cube tex- ture on formation of rolling and recrystallization texture was investigated in high purity Al.With in- creasing widening the initial Cube texture has ro- tated more around rolling direction(RD)and less around transverse direction(TD).Therefore,more orientations rotate in x-fibre between G{110} <001>and B{110}<112>positions,and less in S{124}<211>texture component,which shows the widening plays an important role in the forma- tion of S component during rolling.The relation- ship between rolling and recrystallization texture components is discussed.Though the transition band predicted by Dillamore and Katoh is always formed during rolling,the most important factor in- fluencing recrystallization texture should be the ori- ented growth according to the changes of volume fractions and scatter widths of texture components with widening.
关键词:
texture
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QIAO Lijie LIU Rui XIAO Jimei University of Science and Technology Beijing
,
Beijing
,
China
金属学报(英文版)
The effects of stress components on nucleation sites and propagation directions of stress cor- rosion cracks in brass were investigated with specimens under mode Ⅱ and mode Ⅲ loadings. The results indicated that under mode Ⅱ loading,stress corrosion cracks nucleated on the site with maximum normal stress component and propagated along the plane perpendieular to the maximum normal stress,under mode Ⅲ loading,the stress corrosion crack was not evident on the 45°plane due to the general corrosion in aqueous solution with high NH_4OH concentra- tion,while stress corroded in aqueous solution with low NH_4OH concentration, numerous cracks with spacings of 10—150μm were found on the 45°plane with maximum normal stress and no stress corrosion cracks was observed on the plane with maximum shear stress.
关键词:
stress corrosion cracking
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