Mechanical Property of Ultrafine Elongated Grain Structure Steel Processed by Warm Tempforming and Its Application to Ultra-High-Strength Bolt

DOI DOI Web Site Web Site Web Site 3 Citations 73 References Open Access

Bibliographic Information

Other Title
  • 温間テンプフォーミングで作製した超微細繊維状結晶粒組織鋼の力学特性と超高強度ボルトへの応用
  • オン カン テンプフォーミング デ サクセイ シタ チョウビサイ センイジョウ ケッショウリュウ ソシキコウ ノ リキガク トクセイ ト チョウコウキョウド ボルト エ ノ オウヨウ

Search this article

Description

<p>Our strategy is to enhance the fracture property of ultra-high-strength low-alloy steels with a yield strength of 1.4 GPa or over by arresting the propagation of brittle cracks in hierarchical, anisotropic, and ultrafine-grained structures. This provides a fail-safe design in addition to suppressing crack initiation. The present article reviews the strength, ductility, toughness, and delayed fracture resistance of ultra-high-strength low-alloy steels with ultrafine elongated grain structures processed by the deformation of tempered martensitic structures at elevated temperatures (referred to as warm tempforming). The evolution of heterogeneous microstructures during warm tempforming using multi-pass caliber rolling is discussed, as are the microstructural factors controlling the strength and fracture properties of warm tempformed steels. Furthermore, we apply warm tempformed steels with ultrafine elongated grain structures to the fabrication of ultra-high-strength bolts.</p>

Journal

  • ISIJ International

    ISIJ International 60 (6), 1108-1126, 2020-06-15

    The Iron and Steel Institute of Japan

Citations (3)*help

See more

References(73)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top