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Materials 2017, 10(11), 1293; doi:10.3390/ma10111293

A New Maraging Stainless Steel with Excellent Strength–Toughness–Corrosion Synergy

1
School of Materials Science and Engineering, Northeastern University, Shenyang 110004, China
2
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
3
School of Metallurgy, Northeastern University, Shenyang 110004, China
*
Author to whom correspondence should be addressed.
Received: 17 October 2017 / Revised: 29 October 2017 / Accepted: 8 November 2017 / Published: 10 November 2017
(This article belongs to the Section Structure Analysis and Characterization)
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Abstract

A new maraging stainless steel with superior strength–toughness–corrosion synergy has been developed based on an innovative concept of alloy design. The high strength–toughness combination is achieved by forming dispersive nano-sized intermetallic compounds in the soft lath martensitic matrix with a slight amount of residual austenite. The good corrosion resistance is guaranteed by exactly controlling the Co content based on understanding the synergistic effect between Co and Cr. The fine structure characteristics of two dominant strengthening precipitations including Ni3Ti and Mo-rich phases were finely characterized associated with transmission electron microscope (TEM) and atom probe tomography (APT) analyses. The relationship among microstructure, strength and toughness is discussed. The precipitation mechanism of different precipitates in the new maraging stainless steel is revealed based on the APT analysis. View Full-Text
Keywords: maraging stainless steel; alloy design; strength and toughness; corrosion resistance; atomic probe tomography; precipitation mechanism maraging stainless steel; alloy design; strength and toughness; corrosion resistance; atomic probe tomography; precipitation mechanism
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MDPI and ACS Style

Tian, J.; Wang, W.; Babar Shahzad, M.; Yan, W.; Shan, Y.; Jiang, Z.; Yang, K. A New Maraging Stainless Steel with Excellent Strength–Toughness–Corrosion Synergy. Materials 2017, 10, 1293.

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