-
- Ogasawara Masao
- Fundamental Research Laboratories, Nippon Steel Corporation
-
- Iino Makio
- Fundamental Research Laboratories, Nippon Steel Corporation
-
- Mimura Hiroshi
- Fundamental Research Laboratories, Nippon Steel Corporation
抄録
With a view to investigating the influence of a crystal grain size on fracture behaviours under high concentration of stress and triaxial constraint a notched tensile test was made over a temperature range from −196° to 20°C for an industrial mild steel of grain diameters 15, 45 and 150 microns. The change in a grain size was brought about by changing the normalizing condition. From the mechanical test including an examination of COD, measured using a clip gauge, and metallographical and fractographical observations under a scanning electron microscope, the following results were obtained: (1) With decrease in testing temperature, a fracture below the yield stress occurred in all the three specimens and the fracture stress transition temperature TL was lower in the finer-grained specimen. (2) The decrease in grain diameter resulted in an increase in fracture stress σF for fracture below yield stress. σF tends towards several tens of kilogrammes per square millimetre, with an appreciable fall with decrease in temperature, in the extrapolated single crystal specimen. (3) The transition in fracture stress took place in an abrupt manner, and the abrupt change in fracture stress at TL was more pronounced in the finer-grained specimen.
収録刊行物
-
- Transactions of the Japan Institute of Metals
-
Transactions of the Japan Institute of Metals 13 (1), 6-7, 1972
社団法人 日本金属学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390282680093794432
-
- NII論文ID
- 130003485120
-
- COI
- 1:CAS:528:DyaE38XhtlSntLs%3D
-
- ISSN
- 24324701
- 00214434
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可