scholarly journals First Principle Study of TiB2 (0001)/γ-Fe (111) Interfacial Strength and Heterogeneous Nucleation

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1573
Author(s):  
Qin Wang ◽  
Peikang Bai ◽  
Zhanyong Zhao
Keyword(s):  
Stainless Steel ◽  
Heterogeneous Nucleation ◽  
316L Stainless Steel ◽  
Interfacial Strength ◽  
Interface Energy ◽  
Interface Fracture ◽  
Partial Density ◽  
Covalent Bonds ◽  
Tib2 Particles ◽  
Adhesion Work

TiB2/316L stainless steel composites were prepared by selective laser melting (SLM), and the adhesion work, interface energy and electronic structure of TiB2/γ-Fe interface in TiB2/316L stainless steel composites were investigated to explore the heterogeneous nucleation potential of γ-Fe grains on TiB2 particles using first principles. Six interface models composed of three different stacking positions and two different terminations were established. The B-terminated-top 2 site interface (“B-top 2”) was the most stable because of the largest adhesion work, smallest interfacial distances, and smallest interfacial energy. The difference charge density and partial density of states indicated that a large number of strong Fe-B covalent bonds were formed near the “B-top 2” interface, which increased the stability of interface. Fracture analysis revealed that the bonding strength of the “B-top 2” interface was higher than that of the Fe matrix, and it was difficult to fracture at the interface. The interface energy at the Ti-poor position in the “B-top 2” interface model was smaller than that of the γ-Fe/Fe melt, indicating that TiB2 had strong heterogeneous nucleation potency for γ-Fe.

scholarly journals Interfacial Stability of TiC/γ-Fe in TiC/316L Stainless Steel Composites Prepared by Selective Laser Melting: First Principles and Experiment

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1225
Author(s):  
Peikang Bai ◽  
Qin Wang ◽  
Zhanyong Zhao ◽  
Wenbo Du ◽  
Minjie Liang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Selective Laser Melting ◽  
Interfacial Energy ◽  
Heterogeneous Nucleation ◽  
316L Stainless Steel ◽  
Interfacial Strength ◽  
Interface Energy ◽  
Work Of Adhesion ◽  
Laser Melting ◽  
Covalent Bonds

TiC/316L stainless steel composites were prepared by selective laser melting. The adhesion work, interface energy and electronic structure of the TiC/γ-Fe interfaces in TiC/316L stainless steel composites were studied to investigate the heterogeneous nucleation potential of γ-Fe grains on TiC particles by using the first principle. The degree mismatch between TiC (001) and γ-Fe (001) interface was lowest. There are four TiC (001)/γ-Fe (001) interface models with different stacking sequences (on-site and bridge-site) and different atomic arrangement sequences (C centre and Ti centre). The results show that the Fe-on-Ti centre interface had the largest work of adhesion (3.87 J/m2) and lower interfacial energy (0.04 J/m2), it was more stable, and the interfacial energy of the model was lower than that of γ-Fe/Fe melt (0.24 J/m2). Strong Fe-C covalent bonds and Fe-Ti metallic bonds were formed near the interface, which increased the interfacial strength, indicating that TiC had strong heterogeneous nucleation potency for γ-Fe.

First-Principles Study on Al/Al3Hf Heterogeneous Nucleation Interface

2021 ◽  
Vol 13 (5) ◽  
pp. 787-793
Author(s):  
Ziming Zhuo ◽  
Hongkui Mao ◽  
Yizheng Fu
Keyword(s):  
Heterogeneous Nucleation ◽  
First Principles ◽  
Electronic Structures ◽  
Interface Energy ◽  
Work Of Adhesion ◽  
Electronic Interaction ◽  
Stacking Sequence ◽  
Covalent Bonds ◽  
Heterogeneous Nucleus ◽  
Metal Bonds

Using first-principles method, the work of adhesion (Wad) and electronic structure of Al3Hf (001)/Al (001) interface are studied and the mechanism of Al3Hf as enhanced heterogeneous nucleus of α-Al are discussed. The results indicate that Al + Hf-termination interfaces with same stacking sequence and the HCP (Al atom locating on top of the Al3Hf slab) interface with the same termination have maximum Wad and minimum interface energy (yint), and therefore they are more stable ones. It is noteworthy that Al + Hf-terminated interface with HCP is most steady one. The stacking of Al atoms on Al3Hf substrates tend to occur in this way. Besides, electronic structures indicate that Al + Hf-terminated interfaces have stronger electronic interaction than that of Al-terminated ones and the Al-Hf bonds of Al + Hf-terminated interface with HCP stacking tend to covalent bonds, while Al–Al bonds of Al-terminated one are metal bonds. Al3Hf as enhanced heterogeneous nucleation of α-Al are effective from crystallography and thermodynamics.

Interface Strength and Structure of Explosive Welding Sainless Steel-Aluminum Clad

2009 ◽  
Vol 79-82 ◽  
pp. 1803-1806 ◽  
Author(s):  
Hong Wei Liu ◽  
Jing Bo Yu
Keyword(s):  
Stainless Steel ◽  
Transition Layer ◽  
Explosive Welding ◽  
Interfacial Crack ◽  
Interfacial Strength ◽  
Interfacial Fracture ◽  
Interfacial Shear ◽  
Bending Test ◽  
Interface Fracture ◽  
Fracture Structure

The interface is the area where two type of materials are connected, the strength and property of interface are important for the application of the clad. In this paper, interfacial strength and fracture properties of stainless steel-aluminum clad are analyzed with the methods of interfacial shear test and four point bending test, and the interfacial crack and the interfacial fracture structure are analyzed with SEM. The results show that the bonding of stainless steel and aluminum is successfully realized by explosive welding, the interfacial shear strength reach 70.90MPa, and the interfacial energy release rate is 1.725 MPa•m, the thickness of transition layer is about 10μm at the interface, the interfacial fracture happen and extend in the transition layer along the interface and the interface fracture structure is inclined to brittle fracture.

316L Stainless Steel Diffusion Bonding Optimized Parameters

2017 ◽  
Author(s):  
Gustavo Nuernberg ◽  
Grégori Rosinski ◽  
Priscila Gonçalves ◽  
Marcus Mortean ◽  
Regis Henrique Goncalves e Silva ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Diffusion Bonding ◽  
316L Stainless Steel

Effects of nitrogen and hydrogen in argon shielding gas on bead profile, delta-ferrite and nitrogen contents of the pulsed GTAW welds of AISI 316L stainless steel

2016 ◽  
Vol 58 (6) ◽  
pp. 489-494 ◽  
Author(s):  
Panyasak Phakpeetinan ◽  
Amnuysak Chianpairot ◽  
Ekkarut Viyanit ◽  
Fritz Hartung ◽  
Gobboon Lothongkum
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Aisi 316L ◽  
Shielding Gas ◽  
Delta Ferrite ◽  
Aisi 316L Stainless Steel ◽  
Pulsed Gtaw ◽  
Nitrogen Contents ◽  
Bead Profile

Analysis of deformation induced martensite in AISI 316L stainless steel

2016 ◽  
Vol 58 (6) ◽  
pp. 547-552 ◽  
Author(s):  
Darko Jagarinec ◽  
Peter Kirbiš ◽  
Jožef Predan ◽  
Tomaž Vuherer ◽  
Nenad Gubeljak
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Aisi 316L ◽  
Aisi 316L Stainless Steel

BIODUR 316LS

Alloy Digest ◽  
1995 ◽  
Vol 44 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
316L Stainless Steel ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Improve Corrosion Resistance ◽  
Type 316L ◽  
Type 316L Stainless Steel

Abstract BioDur 316LS stainless steel is a modified version of Type 316L stainless steel to improve corrosion resistance for surgical implant applications. The alloy is vacuum arc remelted. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-596. Producer or source: Carpenter.

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