金属学报  1981, Vol. 17 Issue (6): 677-681

论文 本期目录 | 过刊浏览 |

用正电子湮灭技术研究裂纹顶端塑性区

季国坤;刘年庆;王淑英;姜健;熊良钺;龙期威

中国科学院高能物理研究所;中国科学院高能物理研究所;中国科学院高能物理研究所;中国科学院金属研究所;中国科学院固体物理研究所;中国科学院金属研究所中国科学院固体物理研究所;中国科学院金属研究所中国科学院固体物理研究所

AN INVESTIGATION OF THE PLASTIC ZONE IN THE VICINITY OF THE CRACK-TIP BY POSITRON ANNIHILATION TECHNIQUE

Ji Guokun; Liu Nianqing and Wang Shuying (Institute of High Energy Physics; Academia Sinica) and Jiang Jian; Xiong Liangyue and Long Qiwei (Institute of Solid State Physics; Academia Sinica; are now in the Institute of Metal Research; Academia Sinica)

季国坤;刘年庆;王淑英;姜健;熊良钺;龙期威. 用正电子湮灭技术研究裂纹顶端塑性区[J]. 金属学报, 1981, 17(6): 677-681.
, , , , , . AN INVESTIGATION OF THE PLASTIC ZONE IN THE VICINITY OF THE CRACK-TIP BY POSITRON ANNIHILATION TECHNIQUE[J]. Acta Metall Sin, 1981, 17(6): 677-681.

摘要 参考文献 相关文章 Metrics 全文: PDF(371 KB)   摘要: <正> 正电子湮灭技术对材料的空位、位错等缺陷均十分灵敏,已广泛用于研究点阵缺陷及有关问题。由于塑性区内部塑性变形不均匀,故其内部缺陷密度分布亦是不均匀的,可能导致不均匀的正电子湮灭效应。本文尝试用正电子湮灭技术研究裂纹顶端塑性 Abstract：Central cracked and single edge cracked α-Ti specimens were loaded up to different stress levels and cut into four test pieces after unloading. Both parameters, positron lifetime and Doppler broadening lineshape S parameters were measured in the plastic zone at the crack tip. The Doppler broadening lineshape S parameters were measured as a function of distance from the crack tip along the crack direction, It was found that the S parameters decrease monotonically along the crack direction until the boundary of the plastic zone is reached. The size of plastic zone estimated by the positron annihilation method seems to agree roughly with that obtained from that calculated by fracture mechanics. 收稿日期: 1981-06-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 季国坤 刘年庆 王淑英 姜健 熊良钺 龙期威 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1981/V17/I6/677 [1] Tanigawa, S. and Doyama, M., Progress in the Study of Application of Electron Theory to Materials Science. Ed. by M. Dovama. Univ. Tokyo. 1979． p. 1． [2] 张天保,刘年庆,未发表资料. [3] Wang, Y. Y. (王蕴玉), Chang, T, B. (张天保) and Wang, S. Y. (王淑英), Positron Annihilation, Proc. 5th Int. conf, on Positron Annihilation, Jpn. 1979, Ed. by R. R. Hashiguti and K. Pujiwara. Jpn. Inst. Met.. 1979． p. 227． [4] 王淑英,未发表资料. [5] Doyama, M., Progress in the Study of Point Defect, Ed. by M. Doyama, and S. Yoshids, Univ. Tokyo, 1977, p. 3． [6] 陈篪等,金属断裂研究论文集,冶金工业出版社,1978,p.30． [7] Brown, W. F. Jr.and Srawley, J.E., Am. Soc. Test. Mater., Spec. Tech. Publ., No. 410, 1967． [8] Lardncr, R. W., Mathematical Theory of Dislocations and Fracture, Univ. Toronto, 1974, p. 163． [9] Karras, M., Positron Annihilation, Proc. 5th Int. Conf. on Positron Annihilation, Jpn. 1979, Ed.. by R. R. Hashiguti, and K. Fujiwara, Jpn. Inst. Met., 1979, p. 257 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed