An assessment of cold work effects on strain-controlled low-cycle fatigue behavior of type 304 stainless steel

Journal Article · Thu Apr 01 00:00:00 EST 1993 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

OSTI ID:6788221

Bhanu Sankara Rao, K; Valsan, M; Sandhya, R; Mannan, S L; Rodriguez, P ^[1]

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1. Indira Gandhi Centre for Atomic Research, Tamil Nadu (India)

The influence of prior cold work (PCW) on low-cycle fatigue (LCF) behavior of type 304 stainless steel has been studied at 300, 823, 923, and 1,023 K by conducting total axial strain-controlled tests in solution annealed (SA, 0 pct PCW) condition and on specimens having three levels of PCW, namely, 10, 20, and 30 pct. A triangular waveform with a constant frequency of 0.1 Hz was employed for all of the tests performed over strain amplitudes in the range of [plus minus]0.25 to [plus minus]1.25%. These studies have revealed that fatigue life is strongly dependent on PCW, temperature, and strain amplitude employed in testing. The SA material generally displayed better endurance in terms of total and plastic strain amplitudes than the material in 10, 20, and 30% PCW conditions at all of the temperatures. However, at 300 K at very low strain amplitudes, PCW material exhibited better total strain fatigue resistance. At 823 K, LCF life decreased with increasing PCW, whereas at 923 K, 10% PCW displayed the lowest life. An improvement in life occurred for prior deformation exceeding 10% at all strain amplitudes at 923 K. Fatigue life showed a noticeable decrease with increasing temperature up to 1,023 K in PCW state. On the other hand, SA material displayed a minimum in fatigue life at 923 K. The fatigue life results of SA as well as all of the PCW conditions obeyed the Basquin and Coffin-Manson relationships at 300, 823, and 923 K. A study is made of cyclic stress-strain behavior in SA and PCW states and the relationship between the cyclic strain-hardening exponent and fatigue behavior at different temperatures has been explored. The influence of environment on fatigue crack initiation and propagation behavior has been examined.

• OSTI ID: 6788221
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Vol. 24A:4; ISSN 0360-2133
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STAINLESS STEEL-304
COLD WORKING
FATIGUE
ANNEALING
CORRELATIONS
CRACK PROPAGATION
SERVICE LIFE
STRAINS
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
ALLOYS
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEAT TREATMENTS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
LIFETIME
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
NICKEL ALLOYS
STAINLESS STEELS
STEEL-CR19NI10
STEELS
TEMPERATURE RANGE
360103* - Metals & Alloys- Mechanical Properties
360101 - Metals & Alloys- Preparation & Fabrication