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首页> 外文期刊>International Materials Reviews >Development of fracture toughness of ultrahigh strength, medium carbon, low alloy steels for aerospace applications
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Development of fracture toughness of ultrahigh strength, medium carbon, low alloy steels for aerospace applications

机译：航空航天用超高强度，中碳，低合金钢的断裂韧性的发展

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摘要

Ultrahigh strength, low alloy, steels with a medium carbon (0.25-0.50 wt-%) content and various amounts of chromium, molybdenum, nickel, silicon, and vanadium have been needed for high performance aerospace parts. The steels can be successfully employed at yield strengths of >= 1400 MPa, but their commercial use is often limited in practice by their poor fracture toughness. The present review surveys studies carried out over about the past 10 years to improve the fracture toughness of ultrahigh strength, medium carbon, low alloy steels, and the present understanding of this property is outlined. Particular emphasis is placed on improving the fracture toughness by microstructural control via thermal and thermomechanical treatments, modification of sulphide inclusions, and new alloying design. The major metallurgical factors controlling the fracture toughness are discussed for each of these techniques.
机译：高性能航空航天零件需要具有中等碳含量（0.25-0.50 wt％）的超高强度，低合金钢以及各种量的铬，钼，镍，硅和钒。这些钢可以成功地以> = 1400 MPa的屈服强度进行使用，但实际上，由于其较差的断裂韧性，其商业用途常常受到限制。本综述调查研究在过去10年中进行，目的是提高超高强度，中碳，低合金钢的断裂韧性，并概述了对该特性的当前理解。通过热处理和热机械处理，硫化物夹杂物的改性以及新的合金化设计，通过微结构控制来特别提高断裂韧性。对每种技术都讨论了控制断裂韧性的主要冶金因素。

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