Internal friction of superconducting YBa2Cu3O6+x wires at 200 kHz under in situ heat treatment

1999 ◽  
Vol 28 (9) ◽  
pp. 1032-1037 ◽  
Author(s):  
Masakuni Ozawa ◽  
Masahiko Inagaki ◽  
Suguru Suzuki
Keyword(s):  
Heat Treatment ◽  
Internal Friction ◽  
In Situ Heat Treatment

scholarly journals Additive Manufacturing of Ti-Based Intermetallic Alloys: A Review and Conceptualization of a Next-Generation Machine

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4317
Author(s):  
Thywill Cephas Dzogbewu ◽  
Willie Bouwer du Preez
Keyword(s):  
Heat Treatment ◽  
High Temperature ◽  
Additive Manufacturing ◽  
Complex Geometries ◽  
Intermetallic Alloys ◽  
Tial Alloys ◽  
Conventional Methods ◽  
Manufacturing Technologies ◽  
In Situ Heat Treatment

TiAl-based intermetallic alloys have come to the fore as the preferred alloys for high-temperature applications. Conventional methods (casting, forging, sheet forming, extrusion, etc.) have been applied to produce TiAl intermetallic alloys. However, the inherent limitations of conventional methods do not permit the production of the TiAl alloys with intricate geometries. Additive manufacturing technologies such as electron beam melting (EBM) and laser powder bed fusion (LPBF), were used to produce TiAl alloys with complex geometries. EBM technology can produce crack-free TiAl components but lacks geometrical accuracy. LPBF technology has great geometrical precision that could be used to produce TiAl alloys with tailored complex geometries, but cannot produce crack-free TiAl components. To satisfy the current industrial requirement of producing crack-free TiAl alloys with tailored geometries, the paper proposes a new heating model for the LPBF manufacturing process. The model could maintain even temperature between the solidified and subsequent layers, reducing temperature gradients (residual stress), which could eliminate crack formation. The new conceptualized model also opens a window for in situ heat treatment of the built samples to obtain the desired TiAl (γ-phase) and Ti3Al (α2-phase) intermetallic phases for high-temperature operations. In situ heat treatment would also improve the homogeneity of the microstructure of LPBF manufactured samples.

scholarly journals Effect of Post Processing Heat Treatment Routes on Microstructure and Mechanical Property Evolution of Haynes 282 Ni-Based Superalloy Fabricated with Selective Laser Melting (SLM)

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 629
Author(s):  
Anagh Deshpande ◽  
Subrata Deb Nath ◽  
Sundar Atre ◽  
Keng Hsu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Mechanical Property ◽  
High Temperature ◽  
Selective Laser Melting ◽  
Laser Melting ◽  
Step Heat Treatment ◽  
Microstructure And Mechanical Property ◽  
In Situ Heat Treatment

Selective laser melting (SLM) is one of the most widely used additive manufacturing technologies. Fabricating nickel-based superalloys with SLM has garnered significant interest from the industry and the research community alike due to the excellent high temperature properties and thermal stability exhibited by the alloys. Haynes-282 alloy, a γ′-phase strengthened Ni-based superalloy, has shown good high temperature mechanical properties comparable to alloys like R-41, Waspaloy, and 263 alloy but with better fabricability. A study and comparison of the effect of different heat-treatment routes on microstructure and mechanical property evolution of Haynes-282 fabricated with SLM is lacking in the literature. Hence, in this manuscript, a thorough investigation of microstructure and mechanical properties after a three-step heat treatment and hot isostatic pressing (HIP) has been conducted. In-situ heat-treatment experiments were conducted in a transmission electron microscopy (TEM) to study γ′ precipitate evolution. γ′ precipitation was found to start at 950 °C during in-situ heat-treatment. Insights from the in-situ heat-treatment were used to decide the aging heat-treatment for the alloy. The three-step heat-treatment was found to increase yield strength (YS) and ultimate tensile strength (UTS). HIP process enabled γ′ precipitation and recrystallization of grains of the as-printed samples in one single step.

Effects of In Situ Heat Treatment on the Microstructure and Electronic Properties of Ba0.6Sr0.4TiO3Thin Films

2016 ◽  
Vol 491 (1) ◽  
pp. 134-142 ◽  
Author(s):  
Xiao-Kang Xie ◽  
Jia Yang ◽  
Xiao-Gang Lu ◽  
Jian-Ping Zhou ◽  
Ke-Xin Jin ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Electronic Properties ◽  
In Situ Heat Treatment

scholarly journals In-situ Heat Treatment System using YAG Laser Source. Tempering Process after Laser Quenching.

2002 ◽  
Vol 68 (12) ◽  
pp. 1595-1599 ◽  
Author(s):  
Toshiki HIROGAKI ◽  
Heisaburo NAKAGAWA ◽  
Yoshitaka KOBORI ◽  
Yoshihiro KITA ◽  
Yoshiaki KAKINO
Keyword(s):  
Heat Treatment ◽  
Treatment System ◽  
Laser Source ◽  
Yag Laser ◽  
Laser Quenching ◽  
Tempering Process ◽  
In Situ Heat Treatment

scholarly journals In situ heat treatment in selective laser melted martensitic AISI 420 stainless steels

2015 ◽  
Vol 87 ◽  
pp. 380-385 ◽  
Author(s):  
P. Krakhmalev ◽  
I. Yadroitsava ◽  
G. Fredriksson ◽  
I. Yadroitsev
Keyword(s):  
Heat Treatment ◽  
Stainless Steels ◽  
Aisi 420 ◽  
In Situ Heat Treatment
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