Al과 Cu의 마찰용접시 접합부의 기계적 성질

姜聲甫,閔宅基,李光吉 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.2

This report deals with the mechanical properties when the friction welding between Al and Cu. Main results obtained are as follows; 1) With welding conditions of 2.6sec heating time, the tensile strength of weld interface was reached at that of Al base metal by 75% 2) The hardness of weld interface is considerably higher than hardness of Al base metal and top hardness of radial direction is at half position of periphery. 3) The structure of the joint was transformed as a fine structure in HAZ of meterials and the finest structure like band by high pressure and plastic deformation in weld interface adjacent to Cu.

STS304와 6000계열 알루미늄 합금의 마찰용접성

강성보,윤병수,홍일표,민택기 忠南大學校 産業技術硏究所 1998 산업기술연구논문집 Vol.13 No.1

This study deals with the friction weldability of STS304 Austenitic stainless steel to 6000 series aluminium alloys, those are A6061-T6, A6063, A6351. The total upset the biggest in case of STS304-A6063 and depend on strength of aluminium alloy. All welded specimen in the condition of upset pressure 75MPa exceeded the tensile strength of base metal. As a result of analyzing the tensile fracture surfaces, it showed ductility in case of both STS304-A6063 and STS304-A6351, while it showed poor ductility in case of STS304-A6061-T6. The results of bending test coincide with characteristic of tensile fracture surfaces. In the case of STS304-A6063 and STS304-A6351, any crack did not appear in welded joint, even in bending up to 90o. As a result of EDAX analysis of welded joint, it has been confirmed that Ni, Cr and Fe in STS304 were diffused toward aluminium alloy side. Consequently, friction weldability of STS304-aluminium alloys is determineded by combination of micro deformation and diffusion.

CuW와 Cu를 이용한 마찰용접부의 미세조직에 관한 연구

姜聲甫,閔宅基,洪日杓 忠南大學校 産業技術硏究所 1996 산업기술연구논문집 Vol.11 No.2

This report deals with the microstructure when the friction welding between CuW and Cu. As a result of microstructure analysis, the application of high friction pressure and upset pressure is able to decrease bonding strength because the microstructure of weld interface is changed abruptly. The fine tungsten grains at high friction pressure(6kg/㎟) could induce the crack formation along weld interface and fracture adjacent to the weld interface. HAZ of Cu side was narrowed with high friction pressure because time required to reach steady state was decreased.

段 가공을 한 SM20C 異徑材 摩擦熔接部의 機械的 性質에 關한 硏究

김진건,강성보,민택기 충남대학교 공업교육연구소 1998 論文集 Vol.21 No.1

This study deals with mechanical properties in friction welding of SM20C steel bars and pipes which have different overhang lengths(0mm∼5mm). The experimental results m summarized as follows; In case of pipe, we can conclude that 1mm overhang is optimal condition for the products which needs the tensile and bending strength. But in case of bar, we can conclude that 0mm overhang is optimal condition for the Products which needs the tensile and bending strength.

Genetic Analysis of Pod Dehiscence in Soybean

Kang Sung Taeg,Kim Hyeun Kyeung,Baek In Youl,Chung Moung Gun,Han Won Young,Shin Doo Chull,Lee Suk-Ha The Korean Society of Crop Science 2005 Korean journal of crop science Vol.50 No.4

Pod dehiscence (PD), defined as the opening of pods along both the dorsal and ventral sutures, causes the seed to shatter in the field before harvesting and results in loss of seed yields. However, breeding for resistance to PD is difficult due to the complicated genetic behavior and environmental interaction. The objective of the present research was to analyze the genetic behavior of PD for improving the breeding efficiency of resistance to PD in soybean. PD after oven-drying the sampled pod at $40^{\circ}C$ for 24 hours was the most reliable to predict the degree of PD tested in the field. Keunolkong, a dehiscent parent, was crossed with non-dehiscent parents, Sinpaldalkong and Iksan 10. Using their $F_1\;and\;F_2$ seeds, PD was measured after oven drying the pod at $40^{\circ}C$ for 24 hours. The gene conferring PD behaved in different manners depending on the genetic populations. In the Keunolkong$\times$Sinpaldalkong population, PD seemed to be governed by single major recessive gene and minor genes, while several genes were probably involved in the resistance to pod dehiscence in the Keunolkong$\times$Iksan 10 population. Heritability for PD estimated in F2 population showed over $90\%$ in the two populations. High heritability of PD indicated that selection for resistance to PD should be effective in a breeding program. In addition, genetic mapping of quantitative locus (QTL) for PD in both populations may reveal that genes conferring PD are population-specific.

A New Large Seed Size, Good Seed Quality and High-Yielding Vegetable Soybean Cultivar "Danmiput"

Sung Taeg Kang,In Youl Baek,Myoung Gun Choung,Sea Kwan Oh,Won Young Han,Doo Chull Shin,Su Dong Kim,Soon Chul Kim 한국육종학회 2003 한국육종학회지 Vol.35 No.4

A new vegetable soybean variety, “Danmiput” was selected from the cross Keunol/Wasehakucho (Introduced), and developed in 2002 on the basis of its yield performance and seed quality for vegetable soybean at the National Yeongnam Agricultural Station. “Dan

Genetic Analysis of Pod Dehiscence in Soybean

Sung Taeg Kang,Hyeun Kyeung Kim,In Youl Baek,Moung Gun Chung,Won Young Han,Doo Chull Shin,Suk-Ha Lee 韓國作物學會 2005 Korean journal of crop science Vol.50 No.4

Pod dehiscence (PD), defined as the opening of pods along both the dorsal and ventral sutures, causes the seed to shatter in the field before harvesting and results in loss of seed yields. However, breeding for resistance to PD is difficult due to the complicated genetic behavior and environmental interaction. The objective of the present research was to analyze the genetic behavior of PD for improving the breeding efficiency of resistance to PD in soybean. PD after oven-drying the sampled pod at 40~circC for 24 hours was the most reliable to predict the degree of PD tested in the field. Keunolkong, a dehiscent parent, was crossed with non-dehiscent parents, Sinpaldalkong and Iksan 10. Using their F1~;and~;F2 seeds, PD was measured after oven drying the pod at 40~circC for 24 hours. The gene conferring PD behaved in different manners depending on the genetic populations. In the Keunolkong~times Sinpaldalkong population, PD seemed to be governed by single major recessive gene and minor genes, while several genes were probably involved in the resistance to pod dehiscence in the Keunolkong~times Iksan 10 population. Heritability for PD estimated in F2 population showed over 90~% in the two populations. High heritability of PD indicated that selection for resistance to PD should be effective in a breeding program. In addition, genetic mapping of quantitative locus (QTL) for PD in both populations may reveal that genes conferring PD are population-specific

Identification of QTLs Associated with Flowering and Maturity Traits in Two Recombinant Inbred Lines of Soybean

Kang Sung-Taeg,Kim Hyeun-Kyeung,Seo Min-Jung,Moon Jung-Kyung,Yun Hong-Tae,Lee Seok-Kee,Lee Yeong-Ho,Kim Si-Ju,Choi Byoung-Rcurl 한국작물학회 2006 한국작물학회 학술발표대회 논문집 Vol.2006 No.-

Population-specific QTLs and their different epistatic interactions for pod dehiscence in soybean [Glycine max (L.) Merr.]

Kang, Sung-Taeg,Kwak, Myounghai,Kim, Hyeun-Kyeung,Choung, Myoung-Gun,Han, Won-Young,Baek, In-Youl,Kim, Moon Young,Van, Kyujung,Lee, Suk-Ha Springer-Verlag 2009 Euphytica Vol.166 No.1

수확기 강우가 콩의 종실 품질에 미치는 영향

강성택 ( Sung Taeg Kang ),이주석 ( Ju Suk Lee ),백인열 ( In Youl Baek ),한원영 ( Won Young Han ),신두철 ( Doo Chull Shin ),정명근 ( Myoung Gun Choung ) 한국콩연구회 2014 韓國콩硏究會誌 Vol.31 No.1

수확기 전후 강우는 종실수량감수 뿐 아니라 종자의 품질저하에 큰 영향을 미치며 차 년도에 종자로서 이용 하는데 큰 문제를 발생시킨다. 기상이변 등에 대응하여 안정적인 콩 생산을 위해서는 이러한 불량환경에 대한 내재해성을 갖춘 품종육성이 필요하다. 본 실험은 수확기 장기 강우에 의한 콩 종실의 품질저하 원인을 파악하고 강우에 의한 피해를 검정할 수 있는 적절한 검정방법을 탐색하여 내재해 품종육성의 기초자료로 활용하고자 실시되었다. 강우에 의한 종실의 품질변화를 살펴보기 위하여 포장상태에서 분수호수를 이용하여 인공강우 처리를 실시하고, 등숙기 강우피해에 대한 간이검정 방법을 탐색코자 비가림 하우스조건에서 인공강우를 실시하여 종자의 변화를 관찰하였다. 1. 포장 인공강우 처리에 의한 종실의 품질변화 정도는 발아율은 성숙이 진전될수록, 그리고 강우처리일수가 길어질수록 발아율 감소하는 경향이었다. 발아율과 발아세의 감소와 부패묘의 증가정도로 살펴본 성숙기 강우에 의한 종실의 피해 정도는 품종간 다소 차이가 있었고, 성숙의 진전에 따라서도 차이가 있었으며 또한 처리기간에 따라서 6일 이상의 처리시 급격한 품질 감소를 가져왔다. 2. 비가림 하우스를 이용한 성숙기 이후 인공강우 처리에 의한 종실의 외관 품질의 변화정도는 비정상립의 비율, 병해립의 비율이 증가하였고, 검정콩 1호, 다원콩, 대원콩, 새알콩, 은하콩, 일품검정콩은 6일간 처리에서부터 비정상립의 비율이 유의하게 높아졌으나 만리콩, 소백나물콩, 풍산나물콩은 12일 처리에서만 유의한 차이를 보여 종실외관 품질에서 품종간 차이를 나타내었다. 3. 인공강우 처리에 의한 종실의 발아관련 형질의 변화는 발아율, 발아세, 유묘부패율, 부패립 및 경실종자비율에서 품종간, 처리간 그리고 품종과 처리간 상호작용에서 고도의 유의성이 인정되고, 발아율은 대부분 6일 이상처리에서 발아율의 감소가 유의하게 나타났으나 발아세는 12일부터는 유의하게 감소하였으나 품종간에 차이를 나타내었다. 4. 인공강우처리에 의한 각 형질별 상관관계에서 발아율과 발아세는 부패묘 및 썩은 종자의 비율과 부의 상관을 가졌고 비건전종자 비율과 발아율은 정의상관을 가져 외관 종실의 형태관찰에 의해서도 어느 정도 종자 활력정도를 추정할 수 있으나 이들의 상관정도는 높지 않았다. Soybean (Glycine max (L.) Merr.) seed may lose its vigor depending on the field environment, which was prior to harvest, during development and maturation on the plant. This study was conducted to evaluate the field weathering effect on seed quality after physiological maturity and to achieve proper screening method with rain-shelter-greenhouse. To evaluate the rainfall effect on seed quality, the plant was subject to an artificial rainfall treatment in the field and greenhouse that was able to control rainfall and sunshine. After artificial rainfall treatment, seed vigor was decreased according to seed maturation degree and rainfall treatment duration. To screen tolerant soybean varieties, sufficient filed weathering has taken place after 12 days in the field and greenhouse rainfall treatment. In the both test, the small seeded varieties were more tolerant than large or medium type. Also, the greenhouse rainfall treatment was compared with field rainfall treatment to evaluate the availability of greenhouse test. The result from the greenhouse rainfall treatment can represent the result of field test. Overall, these result showed that a rainfall after maturity significantly decreased seed quality. And greenhouse rainfall test for 12 days can be used to screen soybean varieties with resistant to field weathering, which can be used for development of field weathering resistant soybean variety.