2018/01/08 16:46
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分享:方案摘要:
产品配置单:
牛津仪器Azteclive能谱实时元素成像系统
型号: Azteclive
产地: 英国
品牌: 牛津仪器
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EBSD探测器Symmetry S3 牛津仪器
型号: Symmetry
产地: 英国
品牌: 牛津仪器
¥100万 - 150万
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电镜专用自动清洁度分析系统---牛津仪器AZtecFeature
型号: AZtecFeature
产地: 英国
品牌: 牛津仪器
¥20万 - 30万
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方案详情:
Abstract. This study investigates the changes in radial micro-texture via Kearn’s f-factors during single cold pilger reduction
of a titanium Ti-3-2.5 alloy as a result of strain path changes from tooling modifications. EBSD results confirm that the
texture intensity as well as the radial f-factors can be increased by modifications of pilgering tooling. In addition a switch
between the secondary prism planes which lie normal to the pilger direction in the starting tube to primary prism planes
after pilgering has been observed.
Material and Experimental
The tubes investigated were made from Ti alloy 3Al 2.5V, they were manufactured via hot extrusion and then cold pilgered.
The cold pilger process configuration is schematically shown in Figure 1. Two strain paths, shown in the ‘Q‘ factor chart in
Figure 2, were used in the manufactiure: texture minimised and texture maximised. They were annealed at 750oC before
being cold pilgered and for this investigation they were stress relieved at 530oC for 2 hours prior to EBSD examination.
Specimens were extracted from two regions either side of the reduced tube as shown in the schematic Figure 2, mounted
in conductive Bakelite and polished mechanically for EBSD examination. The final polish was carried out using vibratory
polishes using a mixture of 5:2 colloidal silica, hydrogen peroxide mixture. EBSD examination was conducted using a
FEGSEM and OI EBSD Nordlys detector and AZtec Software.
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