Results 71 to 80 of about 360 (95)

Quantification of the temperature threshold of hydrogen embrittlement in X90 pipeline steel

Materials Science and Engineering: A, 2021
Abstract In the current research, the dependence of hydrogen embrittlement (HE) on the temperature in X90 steel is studied through experimental tests and molecular dynamics simulations. Slow strain rate tests (SSRT) were applied to X90 specimens in the air and the simulated groundwater solution (called NS4), respectively. The fracture morphologies of
Xiao Xing, Ran Cheng, Gan Cui, Jianguo Liu, Jinxin Gou, Chao Yang, Zili Li, Feng Yang   +7 more
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PROPERTIES AND MICROSTRUCTURE OF THIRD GENERATION X90 PIPELINE STEEL

Acta Metallurgica Sinica, 2013
The mechanical properties and microstructure of the TG (third generation) X90 pipeline steels which have been industrially trial-produced were investigated. The results showed that the microstructure of the 18.4 mm thick X90 pipeline steels consist of quasi-polygonal ferrite, lath bainite and M/A (martenite/austenite) island.
Dianxiu XIA, Xuelin WANG, Xiucheng LI, Yang YOU, Chenjia SHAN   +4 more
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Process, Microstructure and Mechanical Properties of X90 Pipeline Steel

Materials Science Forum, 2016
This paper provided a detailed description of X90 pipeline steel developed in Wuhan Iron and Steel Corporation (WISCO), including its metallurgical design, manufacturing process, structural characteristics and mechanical properties. Some key issues such as the cooling rate and rolling parameters were addressed for the development of X90 pipeline steel.
Bin Guo, Jin Qiao Xu, Lei Cui, Qing Feng Wang   +3 more
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Effect of simulated welding thermal cycle on microstructure and mechanical properties of X90 pipeline steel

Materials Science and Engineering: A, 2011
Abstract The effect of welding thermal cycle simulation on the microstructure and mechanical properties of X90 pipeline steel was investigated by means of microstructure analysis, tensile- and Charpy impact-tests. At the heat input of 15 kJ/cm, the microstructure of coarse-grained heat affected zone is mainly composed of lath bainite and granular ...
Wengui Zhao, Wei Wang, Shaohui Chen, Jinbo Qu   +3 more
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Simulated HAZ Continuous Cooling Transformation of X90 Pipeline Steel

Materials Science Forum, 2016
In this paper, the simulation heat affected zone (HAZ) continuous cooling transformation (SHCCT) curve of X90 pipeline steel was drew by using Gleeble 3500 simulator. The results show that the trend of hardening of the weld HAZ of X90 pipeline steel was moderate, and softening tendency was not significant. When cooling rate was between 1°C/s and 10°C/s,
Yu Liu, Ai Qing Ma, Bin Feng
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Preparation of a biomimetic superhydrophobic ZnO coating on an X90 pipeline steel surface

New Journal of Chemistry, 2015
ZnO coating with upright micro–nano structures was fabricated via electrodeposition and hydrothermal treatment. After it was modified by fluorination, the ZnO coating presented superhydrophobicity with the water CA of 157.59° and the SA was less than 10°.
Li Hao, Yu Sirong, Han Xiangxiang
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Effect of welding heat input on grain boundary evolution and toughness properties in CGHAZ of X90 pipeline steel

Materials Science and Engineering: A, 2018
Abstract In the present study, the simulated coarse-grained heat-affected zones (CGHAZs) of X90 pipeline steel were produced using a Gleeble 3500 simulator under different heat inputs (HIs) varying from 10 to 50 kJ/cm to study the effect of HI on grain boundary evolution and toughness properties in CGHAZ of X90 pipeline steel.
Peishan Zhou, Bin Wang, Liang Wang, Yiwen Hu, Luo Zhou   +4 more
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NbC-TiN co-precipitation behavior and mechanical properties of X90 pipeline steels by critical-temperature rolling process

International Journal of Pressure Vessels and Piping, 2018
Abstract The X90 pipeline steels containing Nb and Ti elements have been produced by special critical-tempering rolling process (CTRP) and conventional thermomechanical controlled process (TMCP) respectively. Microstructure was investigated with field emission scanning electron microscopy (FESEM) and field emission transmission electron microscopy ...
J.M. Zhang, C.Y. Huo, Q.R. Ma, Y.R. Feng
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True Stress–Strain Curves Test and Material Property Analysis of API X65 and API X90 Gas Pipeline Steels

Journal of Pipeline Systems Engineering and Practice, 2018
AbstractIn this paper, true stress–strain curves of two natural gas pipeline steels, API-5L X65 and X90, were studied using the three-dimensional digital image correlation (3D-DIC) technique.
L. Z. Kong, X. Y. Zhou, L. Q. Chen, J. Shuai, K. Huang, G. J. Yu   +5 more
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Effect of post-weld heat treatment on corrosion resistance of X90 pipeline steel joints

International Journal of Materials Research
Abstract In order to improve the corrosion resistance of welded joints, X90 pipeline steel joints were subjected to post-weld heat treatment at 610 °C, 640 °C, and 670 °C (holding time was 1 h). Through electrochemical corrosion and full immersion corrosion experiments, the corrosion resistance of welded joints under various conditions ...
Defen Zhang, Qingzheng Ran, Lijie Gong, Xiaowen Chen, Qiyuan Tang, Dezhi Zeng   +5 more
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