Effect of Loading Direaction on the Fracture Mechanism of PST Crystals of Ti-49at% Al Alloys

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Effect of Loading Direaction on the Fracture Mechanism of PST Crystals of Ti-49at% Al Alloys
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                        Lu Yonghao 1,2,Zhang Yonggang 2,Qiao Lijie 1,Wang Yanbin 1,Chen Changqi 2,Chu Wuyang 1Lu Yonghao 1,2,Zhang Yonggang 2,Qiao Lijie 1,Wang Yanbin 1,Chen Changqi 2,Chu Wuyang 1

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Clc Number:V252.2 TG146.23
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Abstract:

The fracture mechanisms of various lamellar oriented polysynthetically twinned (PST) crystals of Ti 49 at%Al based alloy have been studied using in situ SEM technique. The results indicate that the crack nucleation and propagation strongly depend on the lamellar orientations of PST crystals. The oriented PST crystals possess different fracture mechanisms and morphologies, depending on the lamellar orientation

Key words:Ti-Al alloy, PST crystal, fracture mechanism,

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[Lu Yonghao, Zhang Yonggang, Qiao Lijie, Wang Yanbin, Chen Changqi, Chu Wuyang . Effect of Loading Direaction on the Fracture Mechanism of PST Crystals of Ti-49at% Al Alloys[J]. Rare Metal Materials and Engineering,2000,(2):128~131.]
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Revised:May 10,1999
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