Strain Cycling Tests of Large Specimens of AISI Type 347 Stainless Steel and 2-1/4 Croloy

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Description

Twenty-one specimens one in. in diameter were tension-compression strain cycled to failure. Six specimens had transverse holes. Load-strain and load-time records were made. The unit strain ranges used were 0.026 and 0.09. The stainless steel specimens were tested at 662 F (350 C), the 2-1/4 Croloy specimens at 850 F. The cyclic life of a specimen with a hole can be predicated from smooth specimen tests by using the elastic stress concentration factor increased by 15%. In the commonly used exponential relationship between cycles to failure (N) and strain range ( DELTA from tests in /sub p/) N/sup K/ DELTA … continued below

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16 pages : illustrations

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Schnieder, A. K. February 9, 1959.

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  • Main Title: Strain Cycling Tests of Large Specimens of AISI Type 347 Stainless Steel and 2-1/4 Croloy
  • Series Title: AECU (Series)
  • Series Title: Atomic Energy Commission Reports
  • Added Title: Atomic Energy Commission Report AECU-4082

Description

Twenty-one specimens one in. in diameter were tension-compression strain cycled to failure. Six specimens had transverse holes. Load-strain and load-time records were made. The unit strain ranges used were 0.026 and 0.09. The stainless steel specimens were tested at 662 F (350 C), the 2-1/4 Croloy specimens at 850 F. The cyclic life of a specimen with a hole can be predicated from smooth specimen tests by using the elastic stress concentration factor increased by 15%. In the commonly used exponential relationship between cycles to failure (N) and strain range ( DELTA from tests in /sub p/) N/sup K/ DELTA from tests in /sub p/ =c. The material constants are: for AISI type 347 stainless steel K = 0.50, c = 0.42; for 2-1/4 Croloy K = 0.81, c = 2.44. Comparing these tests with those made by others indicates that AISI type 347 stainless steel exhibits a pronounced size effect. The cyclic life at the same plastic strain range is reduced to about one half as the specimen diameter is increased from 0.1875 to 1.0 in. The size effect is negligible for 2-1/4 Croloy. (auth)

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16 pages : illustrations

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Digitized from microopaque cards (1).

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  • Report No.: AECU-4082
  • SuDoc Number: Y 3.At 7:22/AECU-4082
  • Accession or Local Control No: metadc1240515
  • Archival Resource Key: ark:/67531/metadc1240515

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  • February 9, 1959

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  • Nov. 5, 2023, 7:53 a.m.

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  • Sept. 4, 2024, 1:57 p.m.

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Schnieder, A. K. Strain Cycling Tests of Large Specimens of AISI Type 347 Stainless Steel and 2-1/4 Croloy, report, February 9, 1959; Schenectady, New York. (https://digital.library.unt.edu/ark:/67531/metadc1240515/: accessed November 8, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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