THE STUDY OF ADIABATIC SHEAR-BAND INSTABILITY IN A PEARLITIC 4340-STEEL USING A DYNAMIC PUNCH TEST

被引：77

作者：

ZUREK, AK

机构：

[1] Los Alamos National Laboratory, Los Alamos, 87544, NM

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1994年 / 25卷 / 11期

关键词：

D O I：

10.1007/BF02648867

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The formation of adiabatic shear band instabilities in a pearlitic 4340 steel using a dynamic punch test has been studied. The dynamic punch-impact test produced white-etching adiabatic shear bands. The average strain of 0.5 was sufficient to produce adiabatic shear bands in this steel at an average strain rate of 18,000 s(-1). Nanohardness variations found across the adiabatic shear band are thought to be caused by the fragmentation and spheroidization of the Fe3C and the overall deformation and work hardening of the pearlitic microstructure. The cracks formed at the termination of the adiabatic shear band caused the sample to fracture in a ductile mode.

引用

页码：2483 / 2489

页数：7

共 27 条

[1] FLOW LOCALIZATION IN STRAIN-HARDENING CRYSTALLINE SOLIDS [J].

ASARO, RJ ;

NEEDLEMAN, A .

SCRIPTA METALLURGICA, 1984, 18 (05) :429-435

[2]

Beatty J. H., 1992, SHOCK WAVE HIGH STRA, P645

[3] MICROSCOPIC OBSERVATIONS OF ADIABATIC SHEAR BANDS IN 3 DIFFERENT STEELS [J].

CHO, K ;

CHI, YC ;

DUFFY, J .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1990, 21 (05) :1161-1175

[4]

Chojnowski E.A., 1968, METAL SCI J, V2, P14

[5]

DEREP JL, ACTA METALL, V35, P1245

[6] A method for interpreting the data from depth-sensing indentation instruments [J].

Doerner, M. F. ;

Nix, W. D. .

JOURNAL OF MATERIALS RESEARCH, 1986, 1 (04) :601-609

[7]

FOLLANSBEE PS, 1985, METALS HDB, V8, P190

[8] NATURE OF WHITE STREAKS IN IMPACTED STEEL ARMOR PLATE [J].

GLENN, RC ;

LESLIE, WC .

METALLURGICAL TRANSACTIONS, 1971, 2 (10) :2945-&

[9] MEASUREMENT OF THE TEMPERATURE PROFILE DURING SHEAR BAND FORMATION IN STEELS DEFORMING AT HIGH-STRAIN RATES [J].

HARTLEY, KA ;

DUFFY, J ;

HAWLEY, RH .

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 1987, 35 (03) :283-301

[10] SHEAR BANDS IN DEFORMED METALS [J].

HATHERLY, M ;

MALIN, AS .

SCRIPTA METALLURGICA, 1984, 18 (05) :449-454

← 1 2 3 →