Seoul National University

Samsung Electronics Co., Ltd.

Korea Institute of Science and Technology

Tmaxsoft Co., Ltd.

Hyun Seok Oh

Eun Soo Park

Sang Jun Kim

Ji Young Kim

Kooknoh Yoon

Kook Noh Yoon

Sangjun Kim

Chae Woo Ryu

Jinwoo Kim

Il Hwan Kim

Hye Jung Chang

Il-Hwan Kim

Young Hwi Jang

Wookha Ryu

So Yeon Kim

Bong No Yoon

Disclosed are a BCC dual phase refractory superalloy with high phase stability and a manufacturing method therefor, the alloy comprising one or more of Ti, Zr, and Hf as Group 4 transition metals, one or more of Nb and Ta as Group 5 transition metals, and Al, and having a structure of a BCC phase, wherein the BCC phase is composed of a disordered BCC phase and an ordered BCC phase, and wherein the ordered BCC phase is formed by allowing Al, which is a BCC phase forming element, to be soluted in an area of the BCC phase where the contents of the Group 5 transition metals are more than those of the Group 4 transition metals, so that the present disclosure provides a BCC dual phase refractory superalloy with high phase stability, characterized in that when a BCC dual phase with the ordered BCC phase and the disordered BCC phase separated from each other is formed by aging, the aging condition is precisely cont rolled through the apex temperature (T) of the BCC phase miscibility gap, expressed by (Equation 1) below.T(K)=881.4+331.7546.7893&#x2003;&#x2003;(Equation 1)(provided that, 0&#x2264;x&#x2264;1, 0&#x2264;y&#x2264;0.2, 0&#x2264;x+y&#x2264;1, and 0&#x2264;z&#x2264;1).

BCC dual phase refractory superalloy with high phase stability and manufacturing method therefore

Disclosed are a BCC dual phase refractory superalloy with high phase stability and a manufacturing method therefor, the alloy comprising one or more of Ti, Zr, and Hf as Group 4 transition metals, one or more of Na and Ta as Group 5 transition metals, and Al, and having a structure of a BCC phase, wherein the BCC phase is composed of a disordered BCC phase and an ordered BCC phase, and wherein the ordered BCC phase is formed by allowing Al, which is a BCC phase forming element, to be soluted in an area of the BCC phase where the contents of the Group 5 transition metals are more than those of the Group 4 transition metals, so that the present disclosure provides a BCC dual phase refractory superalloy with high phase stability, characterized in that when a BCC dual phase with the ordered BCC phase and the disordered BCC phase separated from each other is formed by aging, the aging condition is precisely controlled through the apex temperature (T) of the BCC phase miscibility gap, expressed by (Equation 1) below.(K)=881.4+331.7*+546.7*+893.0*(provided that, 0&#x2264;&#x2264;1, 0&#x2264;&#x2264;0.2, 0&#x2264;&#x2264;1, and 0&#x2264;&#x2264;1)&#x2003;&#x2003;(Equation 1)

Disclosed is an entropy-controlled solid solution matrix BCC alloy having strong resistance to high-temperature neutron radiation damage. The entropy-controlled solid solution matrix BCC alloy includes three or more multicomponent main elements selected from the element group consisting of Zr, Al, Nb, Mo, Cr, V, and Ti selected based on a neutron absorption cross-sectional area and a mixing enthalpy. Each of the elements is included in an amount of 5 to 35 at %, and the entropy-controlled solid solution matrix BCC alloy is a BCC-structure solid solution matrix alloy in a medium-entropy to high-entropy state. In this invention, damage caused by neutron radiation is reduced, and entropy is controlled to thus ensure a solid solution matrix BCC structure having a slow diffusion speed, and accordingly, resistance to void swelling due to radioactive rays is high.

Entropy-controlled BCC alloy having strong resistance to high-temperature neutron radiation damage

A bi-continuous composite of a refractory alloy and copper, and a method for manufacturing the same, are provided. The method for manufacturing a bi-continuous composite of a refractory alloy and copper includes: providing an alloy melt swapping (AMS) precursor; providing a copper melt with a temperature in a range of 1085&#xb0; C. to 3410&#xb0; C.; immersing the AMS precursor into the copper melt; and removing the AMS precursor from the copper melt. The AMS precursor includes elements having positive and negative mixing enthalpy with copper, respectively. The AMS precursor into which the copper melt is diffused becomes a bi-continuous composite with a first phase formed from the copper and a second phase formed from the AMS precursor.

Bi-continuous composite of refractory alloy and copper and method for manufacturing the same

There are provided metallic glass matrix composites with controllable work-hardening capacity. In more detail, there are provided metallic glass matrix composite with controllable work-hardening capacity capable of having significantly excellent toughness due to a metastable second phase precipitated in-situ in a metallic glass matrix by polymorphic phase transformation during a solidification process without a separate synthetic process, and capable of controlling work-hardening capacity by measuring physical properties of a second phase and adjusting a volume fraction (V) of the second phase due to constant correlation between the physical properties (absorbed energy E, a phase transformation temperature T, or a hardness H) of a metastable B2 second phase precipated in the metallic glass matrix and the absorbed energy (E) by work-hardening per unit volume fraction of the second phase in the metallic glass matrix.

Metallic glass composites with controllable work-hardening capacity

The present invention relates to a high entropy alloy having more improved mechanical properties by controlling contents of additive elements in a NiCoFeMnCr 5-element alloy to control stacking fault energy, thereby controlling stability of a &#x3b3; austenite phase to control a transformation mechanism, wherein the stacking fault energy is controlled in a composition range of NiCoFeMnCr(a+b+c+d+e=100, 1&#x2264;a&#x2264;50, 1&#x2264;b&#x2264;50, 1&#x2264;c&#x2264;50, 1&#x2264;d&#x2264;50, 10&#x2264;e&#x2264;25, and 77a&#x2212;42b&#x2212;22c+73d&#x2212;100e+2186&#x2264;1500), and thus, the &#x3b3; austenite phase exhibits a twin-induced plasticity (TWIP) property or a transformation induced-plasticity (TRIP) property in which the &#x3b3; austenite phase is subjected to phase transformation into an &#x3b5; martensite phase or an &#x3b1;' martensite phase, under stress, thereby having improved strength and elongation at the same time to have excellent mechanical properties.

High entropy alloy having TWIP/TRIP property and manufacturing method for the same

A web server includes a communication unit for receiving or transmitting a message corresponding to the request message which has been processed as a WebSocket message from or to at least one of clients and WAS. A processor, after finishing a WebSocket upgrade, (a) instructs the communication unit to send, to a specific worker thread of the WAS via predetermined internal protocol, the request message which has been processed as the WebSocket message by using a specific connection among a plurality of connections established by a reverse connection scheme for interaction between the web server and the WAS; and (b) receives the response message corresponding to the request message from the specific worker thread via the internal protocol by using the specific connection. The reverse connection scheme establishes at least one connection between the web server and the WAS by the WAS sending a request to the web server.

Method for supporting websocket and web server and web application server using the same

A Radio Frequency Identification (RFID) system and method are provided that includes a reader and a tag which share a predetermined secret key. The reader transmits an authentication request random number to the tag. The reader and the tag generate a Pseudorandom Noise (PN) sequence formed of a series of binary codes from an exclusive disjunction of the authentication request random number and the predetermined secret key. The tag produces an authentication response random number by performing a predetermined conversion operation for the PN sequence and transmits the authentication response random number to the reader. The reader authenticates the tag by analyzing the PN sequence and the authentication response random number.

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Seoul, South Korea

Hyun Seok Oh