Recrystallization behavior and tensile properties of laser metal deposited Inconel 718 upon in-situ ultrasonic impact peening and heat treatment

2020 ◽  
Vol 786 ◽  
pp. 139434
Author(s):  
Yachao Wang ◽  
Jing Shi
Keyword(s):  
Heat Treatment ◽  
Tensile Properties ◽  
Inconel 718 ◽  
Recrystallization Behavior

Investigation on Recovery and Recrystallization of Al-Si-Al2O3 Composites

2013 ◽  
Vol 813 ◽  
pp. 345-350
Author(s):  
Xiong Wei Wang ◽  
Xiao Song Jiang ◽  
De Gui Zhu ◽  
Luo Zhang
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Optical Microscope ◽  
In Situ Synthesis ◽  
Recrystallization Temperature ◽  
Recrystallization Behavior ◽  
Micro Hardness ◽  
Hardness Tester ◽  
Scanning Electron

Al-Si-Al2O3 composites were prepared by powder metallurgy with in-situ synthesis technology. The recovery and recrystallization behavior of Al-Si-Al2O3 composites which underwent compression and then heat-treatment under different temperature were studied using micro-hardness tester, optical microscope (OM) and scanning electron microscopy (SEM) . The results showed that the hardness of composites increased dramatically after compression, and the sample containing 5wt% Si was increasing more evidently than the sample including 10wt%Si. Heat treatment gradually eliminated work hardening; meanwhile the fact that the hardness of composites trended to decline greatly when subjected to annealing suggested occurrence of recovery and recrystallization inside the composites. Recrystallization nucleation preferentially took place in the region near the particle, while the growth of recrystallized grains can also be hindered owning to the pining effect of particles. Depending on the analysis of microstructure and microhardness, it can be concluded that the recrystallization temperature of Al-wt.5%Si-Al2O3 composites was 500°C and the Al-wt.10%Si-Al2O3 composites was 525°C.

Effect of TRIPLEX heat treatment on tensile properties of in situ synthesized (TiB+La2O3)/Ti composite

2010 ◽  
Vol 527 (21-22) ◽  
pp. 5811-5817 ◽  
Author(s):  
Jiuxiao Li ◽  
Liqiang Wang ◽  
Jining Qin ◽  
Yifei Chen ◽  
Weijie Lu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Tensile Properties

The Evolution of Heat Treatment on the Tensile Properties of Na-Modified Al-Mg2Si In Situ Composite

2011 ◽  
Vol 311-313 ◽  
pp. 283-286 ◽  
Author(s):  
R. Khorshidi ◽  
A. Honarbakhsh Raouf ◽  
M. Emamy ◽  
H.R. Jafari Nodooshan
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Quality Index ◽  
Solution Treatment ◽  
Test Results ◽  
Temperature Level ◽  
In Situ Composite ◽  
Different Temperatures

The effect of different solution temperatures has been investigated on the tensile properties of Na-modified Al-Mg2Si in situ composite specimens which were subjected to solutionizing at different temperatures of 480 °C, 500 °C and 520 °C for holding time of 4 h followed by quenching. Tensile test results indicated that elongation value gradually increases upon solution treatment whereas ultimate tensile strength (UTS) reduces. The results of solution treatment also showed that the highest quality index is achieved in 500 °C (354 MPa) and so it is revealed optimum solutionizing temperature level (500 °C) for improving tensile properties.

scholarly journals Control of the Lamellar Structure and Analysis of Tensile Properties of TiC/Ti-6Al-3Sn-9Zr-1.5Mo Composite Produced by In Situ Casting Technique

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 160
Author(s):  
Dongdong Zhu ◽  
Duo Dong ◽  
Li Liu ◽  
Xiaohong Wang ◽  
Jiqiu Qi
Keyword(s):  
Heat Treatment ◽  
Ambient Temperature ◽  
Tensile Properties ◽  
Lamellar Structure ◽  
Tensile Elongation ◽  
Lamellar Microstructure ◽  
Casting Technique ◽  
Heat Treated ◽  
Fully Lamellar

In the present paper, new heat treatment was performed on 10 vol.% TiC/Ti-6Al-3Sn-9Zr-1.5Mo composite fabricated by an in situ casting technique. The aim is to obtain fully lamellar structure in matrix, control the lamellar structure quantitatively and understand the variation of the tensile properties of as-cast and heat-treated composites. For as-cast composite, matrix exhibited fully lamellar structure with some extent of basket-weave characteristics, and reinforcement was mainly in fine rod and strip shape. After β heat treatment, matrix microstructure was refined visibly. As the new cooling method was employed, wider α lath in matrix was obtained. The composite with very fine lamellar structure showed better yield strength (YS) in comparison with that with coarse lamellar microstructure below 650 °C. At 700 °C, fine grain strengthening cannot exert effective influence on tensile strength. It is proved that the enhanced YS is mainly ascribed to the refinement of α lath at ambient temperature. The heat-treated composites with wider α lath displayed excellent ductility at ambient temperature. Above 600 °C, the effect of α phase size on tensile elongation was negligible in the heat-treated composites, since matrix was softened.

scholarly journals Feasibility of in situ controlled heat treatment (ISHT) of Inconel 718 during electron beam melting additive manufacturing

2017 ◽  
Vol 13 ◽  
pp. 156-165 ◽  
Author(s):  
W.J. Sames ◽  
K.A. Unocic ◽  
G.W. Helmreich ◽  
M.M. Kirka ◽  
F. Medina ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Electron Beam ◽  
Additive Manufacturing ◽  
Inconel 718 ◽  
Electron Beam Melting

Cascading of the as-built microstructure through heat treatment and its role on the tensile properties of laser powder bed fused Inconel 718

Materialia ◽  
2021 ◽  
pp. 101272
Author(s):  
R. Jayaraj ◽  
Punit Kumar ◽  
Hang Li Seet ◽  
Sharon M.L. Nai ◽  
Pei Wang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Tensile Properties ◽  
Inconel 718 ◽  
Powder Bed
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