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Research of Materials Science

Research of Materials Science is an international comprehensive professional academic journal of Ivy Publisher, concerning the development of materials science theory and technology application, on the combination of materials science theory and modern industrial technology. The main focus of the journal is the academic papers and comments of latest materials science theory research improvement in the fields of nature science, engineering technol... [More] Research of Materials Science is an international comprehensive professional academic journal of Ivy Publisher, concerning the development of materials science theory and technology application, on the combination of materials science theory and modern industrial technology. The main focus of the journal is the academic papers and comments of latest materials science theory research improvement in the fields of nature science, engineering technology, economy and science, report of latest research result, aiming at providing a good communication platform to transfer, share and discuss the theoretical and technical development of materials science theory for professionals, scholars and researchers in this field, reflecting the academic front level, promote academic change and foster the rapid expansion of materials science theory and technology research.

The journal receives manuscripts written in Chinese or English. As for Chinese papers, the following items in English are indispensible parts of the paper: paper title, author(s), author(s)'affiliation(s), abstract and keywords. If this is the first time you contribute an article to the journal, please format your manuscript as per the sample paper and then submit it into the online submission system. Accepted papers will immediately appear online followed by printed hard copies by Ivy Publisher globally. Therefore, the contributions should not be related to secret. The author takes sole responsibility for his views.

ISSN Print:2327-0470

ISSN Online:2327-0489

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Paper Infomation

A Study on the Characterization of Mechanical Properties of Grade X80 High Strain Line Pipe Steel

Full Text(PDF, 442KB)

Author: Weihua Sun, Shue Hu, Guobao Li, Hao Yu, lei Zhang, Liwei Liu

Abstract: This paper introduces mechanical and metallurgical properties of 27mm thick Grade X80 high strain line pipe steel which aims at constructing long distance natural gas over permafrost and seismic areas. The steel is molybdenum and boron free. Dual phase of the X80 steel plates are regulated by thermal-mechanical controlled processing. The outer diameter of 1219mm pipes are manufactured by UOE process. DWTT toughness and longitudinal tensile properties including the Rt0.5/Rm, Rt1.5/Rt0.5 and Rt2.0/Rt1.0 are analyzed on both the plates and the pipes. Strain aging properties are also evaluated on the base material of the pipe, demonstrating that the pipe complies well with the pipeline construction requirements. Strengthening effects of precipitates are analyzed, revealing a 58.1MPa strengthening contribution by precipitates less than 20nm in size. Dislocation hardening is approximately 176MPa in the present studied steel.

Keywords: High Strain; Line Pipe; Dual Phase Microstructure; Uniform Elongation; Precipitation; Dislocation Hardening

References:

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