Enhancement of Upper Shelf Energy through Delamination Fracture in 0.05 pct P Doped High-Strength Steel

2012 ◽  
Vol 43 (7) ◽  
pp. 2453-2465 ◽  
Author(s):  
Meysam Jafari ◽  
Yuuji Kimura ◽  
Kaneaki Tsuzaki
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Shelf Energy ◽  
Delamination Fracture

Role of Delamination Fracture for Enhanced Impact Toughness in 0.05 %P Doped High Strength Steel with Ultrafine Elongated Grain Structure

2011 ◽  
Vol 409 ◽  
pp. 231-236 ◽  
Author(s):  
Meysam Jafari ◽  
Yuuji Kimura ◽  
Kaneaki Tsuzaki
Keyword(s):  
Rolling Direction ◽  
Charpy Impact ◽  
High Strength ◽  
Ferrite Matrix ◽  
Deformation Texture ◽  
Grain Structure ◽  
Shelf Energy ◽  
Temperature Range ◽  
Delamination Fracture ◽  
Fiber Deformation

Ultrafine elongated grain (UFEG) structures with strong <110>// rolling direction (RD) fiber deformation texture were produced by warm caliber-rolling at 773 K, namely tempforming in the 1200 MPa-class medium-carbon low-alloy steel with phosphorous (P) contents of 0.001 and 0.053 mass%. Charpy impact tests were performed at temperature range of-196 to 150 °C on the UFEG structure. Regardless of P content, high upper shelf energy about 145 J and a very low ductile to brittle transition temperature (DBTT) of around-175 °C were obtained. P segregation embrittlement completely disappeared in the 0.053 %P steel and both steels showed ductile fracture on the planes normal to RD at temperature range of-150 to 150 °C. The main reason for the high upper shelf energy and very low DBTT in the 0.053 %P steel would be delamination fracture along RD when both 0.001 and 0.053 %P steels showed quite similar microstructures including texture. Since the occurrence of delamination requires relatively weak interfaces or planes, P segregated to the ferrite grain boundaries and interfaces of cementite particles-ferrite matrix and made them feasible paths for crack branching and consequently delamination occurred. We showed in this work the advantage of delamination (crack arrester-type) on the high absorbed energy obtained by 0.053 %P steel in comparison with 0.001 %P steel.

Enhancement of Impact Toughness by Delamination Fracture in a Low-Alloy High-Strength Steel with Al Alloying

2016 ◽  
Vol 47 (12) ◽  
pp. 5985-5993 ◽  
Author(s):  
Junjie Sun ◽  
Tao Jiang ◽  
Hongji Liu ◽  
Shengwu Guo ◽  
Yongning Liu
Keyword(s):  
Impact Toughness ◽  
High Strength Steel ◽  
High Strength ◽  
Delamination Fracture

COMPARATIVE CHARACTERISTICS OF PHYSICAL AND MECHANICAL PROPERTIES OF COMPOSITE MATERIALS AND HIGH-STRENGTH STEEL 30FGSN2A

2020 ◽  
Author(s):  
I.R. Antypes ◽  
◽  
V.V. Zaitsev ◽  
Keyword(s):  
Composite Materials ◽  
High Strength Steel ◽  
Critical Stress ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Aviation Industry ◽  
Specific Strength ◽  
Aircraft Landing ◽  
Carbon Plastics ◽  
Aircraft Landing Gear

Currently, the use of composite materials is increasingly used in various areas of the national economy, including the aviation industry. The materials of this article are devoted to the study of the use of composite materials for the manufacture of aircraft landing gear in comparison with the traditionally used brand of steel. As a result of the work carried out, it was found that the slope made of carbon fiber showed a critical stress twice as high as its design made of 30xgsn2a steel. In addition, carbon plastics are superior to high-strength steel in terms of specific strength, stiffness, and tensile strength.

Combined research of dispersed phases in high-strength steel

2018 ◽  
pp. 69-78
Author(s):  
M. L. Fedoseev ◽  
◽  
M. S. Mikhailov ◽  
N. F. Drozdova ◽  
S. N. Petrov ◽  
...  
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Dispersed Phases
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