Results 21 to 30 of about 8,297 (199)

Aluminum depletion induced by co-segregation of carbon and boron in a bcc-iron grain boundary

Nature Communications, 2021
The local variation of grain boundary atomic structure and chemistry caused by segregation of impurities influences the macroscopic properties of polycrystalline materials.
A. Ahmadian, D. Scheiber, X. Zhou, B. Gault, C. H. Liebscher, L. Romaner, G. Dehm   +6 more
doaj   +1 more source

Effect of Trace Mg on Impact Toughness of 2.25Cr1Mo Steel Doped with 0.056% P at Medium Temperature Aging Process

Metals, 2020
In order to investigate the effect of Mg addition on the embrittlement of Cr-Mo steels, the 2.25Cr1Mo steel plates containing Mg, P contents were refined with vacuum induction furnace and rolled with double-stick reversible rolling mill.
Xin Dong, Xiaobing Li, Weiwei Xing, Leilei Ding, Yingche Ma, Kui Liu, Nannan Zhang   +6 more
doaj   +1 more source

An understanding of hydrogen embrittlement in nickel grain boundaries from first principles

Materials & Design, 2021
Here, the segregation and accumulation of hydrogen in Ni grain boundaries, and its effects on cohesion and tensile mechanical strength were studied by means of density functional theory simulations. Three model grain boundaries were considered: the Σ3(11¯
Han Lin Mai, Xiang-Yuan Cui, Daniel Scheiber, Lorenz Romaner, Simon P. Ringer   +4 more
doaj   +1 more source

First-Principles Study of B Segregation at Austenite Grain Boundary and Its Effect on the Hardenability of Low-Alloy Steels

Metals, 2022
Addition of B is beneficial for the hardenability of low-alloy steels and the effect is further improved when combined with the addition of Mo. While experiments demonstrated that Mo reduces the M23(C,B)6 precipitation and indicated an interaction ...
Jingliang Wang, Xiang Yang, Rongtao Qian, Xuequan Rong, Zhenjia Xie, Chengjia Shang   +5 more
doaj   +1 more source

Surface Cracking in 05Cr17Ni4Cu4Nb Precipitation-Hardened Stainless Steel During Secondary Forging： Mechanisms and Solutions [PDF]

Teshugang
05Cr17Ni4Cu4Nb steel is a martensitic precipitation-hardened stainless steel that frequently exhibits surface cracking during secondary forging， significantly compromising forging efficiency and product yield.In this study， the original austenite ...
Zhao　Jiali, Xin　Ruishan, Yu　Zhanyang, Cao　Chenxing, Xue　Feng, He　Yudong, Zhou　Peng
doaj   +3 more sources

Grain Boundary Segregation: the New Sprouts

, 2022
Some aspects of grain boundary segregation (GBS) are discussed. This paper adds two new sprouts. The first is connected with formation of the atomic complexes in boundary region and their effect on grain boundary diffusion (GBD).
Pokhvisnev, Yury, Rodin, Alexei, Itckovich, Alexei, Bokstein, Boris   +3 more
core   +3 more sources

Effects of low-frequency magnetic field on grain boundary segregation in horizontal direct chill casting of 2024 aluminum alloy [PDF]

China Foundry, 2005
Effects of low frequency electromagnetic field on grain boundary segregation in horizontal direct chill (HDC)casting process was investigated experimentally.
Zhihao ZHAO, Jianzhong CUI, Jie DONG
doaj  

Interpretation of microstructure evolution and mechanical properties under aging treatments of a Fe–24Mn-0.6C–2Al-0.6V austenitic steel for cryogenic application

Journal of Materials Research and Technology, 2023
Aging treatment is an effective way of strengthening high-Mn strip steels based on automotive industry. However, the role of this method in enhancing yield strength and cryogenic toughness (−196 °C) of high-Mn steels has still unclear so far.
Jia-kuan Ren, Zhi-hong Li, Xin Zhou, Si-wei Wu, Jun Chen, Zhen-yu Liu   +5 more
doaj   +1 more source

GRAIN BOUNDARY NON-EQUILIBRIUM SEGREGATION IN STEELS

, 1990
A model quantifying the kinetics and magnitude of non-equilibrium and equilibrium grain boundary segregation in metallic solids is described. The major input parameters for the model are : vacancy-impurity binding energies ; diffusion data for impurities
R.G. FAULKNER
core   +1 more source

Mo segregation-induced changes of grain boundary segregation, precipitation, and fracture behaviors in Fe–Mn–Ni–Mo maraging steel

Journal of Materials Research and Technology
The effects of Mo pre-segregation on the changes of the grain boundary segregation, precipitation, and fracture behaviors in Fe–Mn–Ni-based maraging steel were studied by microscopic observation and First-principles calculations.
Dong-Hyun Kim, Yoon-Uk Heo
doaj   +1 more source