金属学报  1983, Vol. 19 Issue (4): 80-150

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双相钢断裂特性的研究

马鸣图;汪德根;吴宝榕

冶金工业部钢铁研究总院;冶金工业部钢铁研究总院;冶金工业部钢铁研究总院

A STUDY OF FRACTURE CHARACTERISTICS OF DUAL PHASE STEEL

by MA Mingtu; WANG Degen; WU Baorong (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing) (Manuscript received 17 March; 1982)

马鸣图;汪德根;吴宝榕. 双相钢断裂特性的研究[J]. 金属学报, 1983, 19(4): 80-150.
, , . A STUDY OF FRACTURE CHARACTERISTICS OF DUAL PHASE STEEL[J]. Acta Metall Sin, 1983, 19(4): 80-150.

摘要 参考文献 相关文章 Metrics 全文: PDF(2744 KB)   摘要: 本文研究了双相钢的断裂特性。用缺口试棒四点弯曲试验法测定了双相钢的解理断裂应力σ_f;根据解理断裂温度下断口形貌、微裂纹萌生和扩展以及显微组织的观察结果,得出了双相钢的裂纹扩展途径;根据σ_f与开裂单元的测定结果,并考虑到微裂纹的形状对解理断裂应力的影响,计算了双相钢的有效表面能。提出了双相钢解理断裂的应力扩展控制模型,并得出了σ_f=(0.33+19.33-c~(·1/2))kgf/mm~2的回归关系式。提高双相钢解理断裂应力的途径是:降低铁素体的晶粒尺寸,尽可能使马氏体岛细化,分布均匀和增加马氏体岛中板条马氏体的比例。 Abstract：The cleavage fracture stress of the dual phase steels has been evaluated with slow-bend test of blunt V-notched specimens. Their crack propagation path and fracture mode were indicated by the observations of the fracture morphology, the mieroeraek initiation and propagation of fracture surfaces under the cleavage temperature and the mierostrueture. According to the measurements of the cleavage fracture stress and the crack unit, the effective surface energy of the dual phase steels was also calculated by Griffith's equation. It was proposed that the cleavage fracture of the dual phase steels seems to be controlled by stress propagation and its regressive equation may be σ_f =0.33+19.33c~(-1/2) kgf/mm~2. Thus, the cleavage fracture stress may be increased by reducing the grain size of ferrite and martensite islands and by increasing the amount of evenly distributed lath martensite in the islands. 收稿日期: 1983-04-18      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 马鸣图 汪德根 吴宝榕 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1983/V19/I4/80 1 马鸣图;吴宝榕,国外金属材料,(1981) ,№ 6,1． 2 Balliger, N. K.; Gladman, T., Met. Sci., 15 (1981) , 95． 3 Owen, W. S., Met. Technol., 7 (1980) , 1． 4 Davies, R. G.; Magee, C. L., Structure and Properties of Dual Phase Steel, Eds. Kot, R. A.; Morris, J. W., Jr., TMS/AIME, New York, 1979, p. 1-19． 5 Gerbase, J.; Embury, J. D.; Hobbs, R. M., ibid., p.118． 6 Becket, J.; Hornbogen, E.; Stratrnan, P., Z. Metallk., 71 (1980) , 27． 7 铃本驍一;荒木健治,金属,48(1978) ,№ 4,37． 8 Knott, J. F., Fundamentals of Fracture Mechanics, London, Butterworths, 1973, p. 176． 9 马鸣图;汪德根;吴宝榕,理化检验,A物理,18(1982) ,5,2． 10 Knott, J. F., Fracture, 1977, Vol.1, ICF4, Waterloo, Canada, June 1977, p.62． 11 Curry, D. A.; Knott, J. F., Met. Sci., 12 (1978) , 511． 12 Irwin. G. R., J. Appl. Mech., 29 (1962) . 651． 13 柳祖恩;蔡其巩,上海金属,(1982) ,№ 4,60．f No related articles found! Viewed Full text Abstract Cited   Shared      Discussed