Microstructural Factors Controlling Blunt- and Sharp-Notch Toughness in La-Added 8Ni-13Co Secondary Hardening Steel

被引：5

作者：

Cho, Ki-Sub ^{[1
]}

Park, Sung-Soo ^{[1
]}

Kim, Young-Bu ^{[1
]}

Moon, Hee-Kwon ^{[2
]}

Kwon, Hoon ^{[1
]}

机构：

[1] Kookmin Univ, CAMT, Seoul 136702, South Korea

[2] Human Resources Dev Serv Korea, Seoul 121757, South Korea

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2013年 / 44A卷 / 10期

基金：

新加坡国家研究基金会;

关键词：

HIGH-STRENGTH STEELS; AUSTENITIZING TEMPERATURE; FRACTURE-BEHAVIOR; SULFIDE TYPE; HY180; STEEL; ALLOY;

D O I：

10.1007/s11661-013-1927-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Toughness variations of sharp and blunt notches were studied. For the quantitative analysis of various particles, small-angle neutron scattering was conducted. Under the 1323 K (1050 A degrees C), and the 1473 K/1323 K and 1473 K/1173 K (1200 A degrees C/1050 A degrees C and 1200 A degrees C/900 A degrees C) (high-temperature initial step and low-temperature final step) austenitizing conditions, the impact toughness underwent changes as follows: 30 -> 30 -> 43 J. In contrast, the fracture toughness underwent variations as follows: 90.5 -> 120 -> 114 MPa. Blunt- and sharp-notch toughness parameters were found to be mainly dependent on grain size and primary particles, respectively. The microstructural dependence of toughness with notch acuity is discussed in detail.

引用

页码：4440 / 4444

页数：5

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