公开(公告)号：US20160326616A1

公开(公告)日：2016-11-10

申请号：US15146151

申请日：2016-05-04

Applicant: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION ,  KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Eun Soo PARK ,  Hyun Seok OH ,  Il Hwan KIM ,  Hye Jung CHANG ,  Sangjun KIM ,  Chae Woo RYU

IPC: C22C30/00 ,  C22C16/00 ,  C22C27/04 ,  C22C27/02 ,  C22C27/06 ,  G21C11/08 ,  C22C1/02 ,  C22C1/04 ,  B22F3/105 ,  B22F3/15 ,  G21C1/02 ,  C22C14/00 ,  C22C21/00

CPC classification number: C22C30/00 ,  B22F3/105 ,  B22F3/15 ,  B22F2003/1051 ,  C22C1/02 ,  C22C1/026 ,  C22C1/04 ,  C22C1/0416 ,  C22C1/045 ,  C22C1/0458 ,  C22C14/00 ,  C22C16/00 ,  C22C21/00 ,  C22C27/02 ,  C22C27/025 ,  C22C27/04 ,  C22C27/06 ,  G21C1/02 ,  G21C3/07 ,  G21C11/083 ,  G21C13/08 ,  Y02E30/34

Abstract: 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.

Abstract translation: 公开了一种对高温中子辐射损伤具有很强抵抗力的熵控制固溶体矩阵BCC合金。 熵控制固溶体BCC合金包括三种或更多种选自基于中子吸收截面积选择的由Zr，Al，Nb，Mo，Cr，V和Ti组成的元素组的多组分主要元素和混合 焓 每个元素的含量为5〜35原子％，熵控制固溶体BCC合金是中熵至高熵态的BCC结构固溶体基质合金。 在本发明中，减少了由中子辐射引起的损伤，并且控制熵，从而确保了具有缓慢扩散速度的固溶体矩阵BCC结构，因此，由于放射线而对空隙膨胀的抵抗性高。

公开(公告)号：US20170101702A1

公开(公告)日：2017-04-13

申请号：US15287693

申请日：2016-10-06

Applicant: Seoul National University R&DB Foundation

Inventor： Eun Soo PARK ,  Wookha RYU ,  Hyun Seok OH ,  Jinwoo KIM ,  So Yeon KIM

IPC: C22C45/10

CPC classification number: C22C45/10 ,  C22C1/002 ,  C22C45/001

Abstract: 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 (Vf) of the second phase due to constant correlation between the physical properties (absorbed energy Eta, a phase transformation temperature TMs, or a hardness H2nd) of a metastable B2 second phase precipated in the metallic glass matrix and the absorbed energy (Epa,V) by work-hardening per unit volume fraction of the second phase in the metallic glass matrix.

公开(公告)号：US20230058823A1

公开(公告)日：2023-02-23

申请号：US17965103

申请日：2022-10-13

Applicant: Seoul National University R&DB Foundation

Inventor： Eun Soo PARK ,  Sang Gun KIM ,  Ji Young KIM ,  Hyun Seok OH ,  Kook Noh YOON

IPC: C22C30/00 ,  C22C21/00 ,  C22C1/02

Abstract: 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 (Tc) of the BCC phase miscibility gap, expressed by (Equation 1) below. Tc(K)=881.4+331.7*x+546.7*y+893.0*x*z  (Equation 1) (provided that, 0≤x≤1, 0≤y≤0.2, 0≤x+y≤1, and 0≤z≤1)

公开(公告)号：US20190062884A1

公开(公告)日：2019-02-28

申请号：US16106232

申请日：2018-08-21

Applicant: Seoul National University R&DB Foundation

Inventor： Eun Soo PARK ,  Wookha RYU ,  Hyun Seok OH ,  Jinwoo KIM ,  So Yeon KIM

IPC: C22C45/10

Abstract: 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 (Vf) of the second phase due to constant correlation between the physical properties (absorbed energy Eta, a phase transformation temperature TMs, or a hardness H2nd) of a metastable B2 second phase precipated in the metallic glass matrix and the absorbed energy (Epa,V) by work-hardening per unit volume fraction of the second phase in the metallic glass matrix.