TENSILE FRACTURE AND FRACTOGRAPHIC ANALYSIS OF 1045 SPHEROIDIZED STEEL UNDER HYDROSTATIC-PRESSURE

被引：56
作者：
KAO, AS
KUHN, HA
RICHMOND, O
SPITZIG, WA
机构：
[1] UNIV PITTSBURGH,PITTSBURGH,PA 15261
[2] ALCOA TECH CTR,ALCOA CTR,PA 15069
[3] IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011
来源：
JOURNAL OF MATERIALS RESEARCH | 1990年 / 5卷 / 01期
关键词：
D O I：
10.1557/JMR.1990.0089
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Void formation in tensile test under hydrostatic pressure is characterized through quantitative metallography, and the fracture mechanism under pressure is analyzed by fractography. Transition of the fracture surface from the cup-and-cone under atmospheric pressure to a slant structure under high pressure is explained on the basis of the void development leading to fracture and the concomitant change in fracture mechanism. The concept of “shear blocks” is introduced to illustrate the features observed on the fracture surface of specimens tested under high pressure. It is postulated that shear blocks evolve to connect the central crack regions with the shear crack initiated on neck surface due to the severe necking deformation under applied pressure. © 1990, Materials Research Society. All rights reserved.
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页码：83 / 91
页数：9
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