Investigation on electrically-assisted diffusion bonding of Ti2AlNb alloy sheet by microstructural observation, mechanical tests and heat treatment

2018 ◽  
Vol 157 ◽  
pp. 351-361 ◽  
Author(s):  
Xiao Li ◽  
Guofeng Wang ◽  
Yibin Gu ◽  
Danfeng Li ◽  
Hui Fang
Keyword(s):  
Heat Treatment ◽  
Diffusion Bonding ◽  
Mechanical Tests ◽  
Alloy Sheet ◽  
Microstructural Observation ◽  
Electrically Assisted ◽  
Ti2alnb Alloy

Study of Cu Addition on Precipitation Behaviors and Mechanical Properties in AA6082 Al-Mg-Si Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 825-828 ◽  
Author(s):  
Man Jin ◽  
Jing Li ◽  
Guang Jie Shao
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Thermal Stability ◽  
Treatment Process ◽  
Mechanical Tests ◽  
Age Hardening ◽  
Heat Treatment Process ◽  
Softening Process

The precipitation behaviors and microstructures of nano-precipitates in AA6082 Al-Mg-Si alloy with and without Cu additions during heat treatment process were studied using hardness measurements, TEM, mechanical tests and 3DAP. Meanwhile, the softening process of 6082 alloys with Cu and without Cu, isothermally conditioned at 250°C, has also been investigated. It was found that the rate of age hardening, mechanical properties and thermal stability are higher for the Cu-containing alloy. The TEM and 3DAP observations showed that Q’ precipitates were existed after aged at 170°C for 8h in the alloy with Cu addition. Comparing the hardness, mechanical properties and thermal stability curves, it was concluded that the Q’ precipitates play a major role in improving the age hardening kinetics and properties of 6082 alloy with Cu addition.

scholarly journals Preparation and Assessment of Heat-Treated α-Chitin Nanowhiskers Reinforced Poly(viny alcohol) Film for Packaging Application

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1883 ◽  
Author(s):  
Chao Peng ◽  
Guangxue Chen
Keyword(s):  
Heat Treatment ◽  
Composite Films ◽  
Barrier Properties ◽  
Mechanical Tests ◽  
Light Transmittance ◽  
Poly Vinyl Alcohol ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heat Treated ◽  
Chitin Nanowhiskers

In this study, poly(vinyl alcohol) (PVA) composite films enhanced by α-chitin nanowhiskers (ChWs) were prepared through heat treatment. The obtained membranes were assessed by means of FTIR spectroscopy, X-ray diffraction, thermogravimetric analysis, regular light transmittance, mechanical tests, permeability and water absorption. The influence of the nano-component and heat treatment on the mechanical, thermal and water-resistant properties of the composite membrane were analyzed. From the results of the work, the produced films with excellent barrier properties and inexpensive raw processed materials have great prospects in packaging applications.

scholarly journals Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature

Metals ◽  
2015 ◽  
Vol 6 (1) ◽  
pp. 1 ◽  
Author(s):  
Shi-Hong Zhang ◽  
Neng-Yong Ye ◽  
Ming Cheng ◽  
Hong-Wu Song ◽  
Hong-Wei Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cold Rolling ◽  
Room Temperature ◽  
Alloy Sheet ◽  
Gh4169 Alloy

scholarly journals Spark Plasma Diffusion Bonding of TiAl/Ti2AlNb with Ti as Interlayer

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3300
Author(s):  
Boxian Zhang ◽  
Chunhuan Chen ◽  
Jianchao He ◽  
Jinbao Hou ◽  
Lu Chai ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Base Metal ◽  
Diffusion Bonding ◽  
Energy Dispersive Spectrometer ◽  
Tensile Tests ◽  
Slow Cooling ◽  
Ti2alnb Alloy ◽  
Heat Treated ◽  
Plasma Diffusion ◽  
Spark Plasma

To solve the problem of poor weldability between TiAl-based and Ti2AlNb-based alloys, spark plasma diffusion bonding was employed to join a TiAl alloy and a Ti2AlNb alloy with a pure Ti foil as interlayer at 950 °C/10 KN/60 min. After welding, slow cooling was carried out at a rate of 5 °C/min, followed by homogenization at 800 °C for 24 h. The microstructural evolution and elemental migration of the joint were analyzed via a scanning electron microscope equipped with an energy dispersive spectrometer, while the mechanical properties of the joint were assessed via microhardness and tensile tests. The results show that the spark plasma diffusion bonding formed a joint of TiAl/Ti/Ti2AlNb without microcracks or microvoids, while also effectively protecting the base metal. Before heat treatment, the maximum hardness value (401 HV) appeared at the Ti2AlNb/Ti interface, while the minimum hardness value (281 HV) occurred in the TiAl base metal. The tensile strength of the heat-treated joint at room temperature was measured to be up to 454 MPa, with a brittle fracture occurring in the interlayer. The tensile strength of the joint at 650 °C was measured to be up to 538 MPa, with intergranular cracks occurring in the TiAl base metal.

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