http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Pagidi Madhukar (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
R. Seetharam,Pagidi Madhukar,G. Yoganjaneyulu,S. Kanmani Subbu,M. J. Davidson 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.4
Mathematical models are among the new approaches employed to predict the properties of any material under various conditions. Mathematical models are essential for not only understanding the material properties but also estimating the costof design, product life, and failure criteria of the product. Therefore, in the current investigation, the hot deformation (HD)behaviour and microstructure alteration of deformed AA7150-5 wt% B4Ccomposite was studied through a mathematicalmodel. The new AA7150-5 wt% B4C composite was fabricated through an ultrasonic-probe assisted (20 KHz, 1000 W)stir casting process. The hot compression test was performed on a hydraulic press for various deformation temperatures(623–773 K) and strain rates (0.01–1 s−1). Based on the outcome, it is inferred that the flow stresses and microstructuresof AA7150-5 wt% B4Ccomposite was significantly altered during the hot compression test under various deformationconditions. The constitutive and dynamically recrystallized grain (DRXed) models were developed as a function of variousdeformation conditions of deformed AA7150-5 wt% B4Ccomposite, which was then applied to forecast the flow stress andgrain size behaviour for different deformation conditions. The flow stress and DRXed grain size were obtained through theproposed constitutive and DRXed models are correlated with experimental results, with excellent accuracy. The modelsdeveloped are reliable to predict the AA7150-5 wt% B4Cproperties for various conditions.
-
Kandi Kishore Kumar,Punugupati Gurabvaiah,Madhukar Pagidi,Rao C. S. P. 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.5
In the current study, response surface methodology (RSM) was successfully used to the method of preparation of fused silica (SiO 2 ) ceramic composites using gelcasting, a near net shape method. The effects of input parameters like solid loading (SL), monomer content (MC), ratio of monomer (RM), and additive boron nitride (BN) and on responses such as flexural strength (FS), porosity (Por.), and dielectric constant (DE) were studied. RSM with central composite face-centered design with 6 center points approach used for planning the tests. The relation between the input variables on the output was investigated and modeled. Three regression models were established using RSM related independent input variables to describe the FS, Por., and DE as the response. The uniqueness of the established model is examined using Analysis of Variance (ANOVA) at 95% confidence level. The numerical investigation of the results showed that in range studied, the three process variables have significant effect on the responses. The obtained mathematical models have high R 2 values (97.66% for FS, 98.45% for Por., and 94.34% for DE) show the good relation between the test and predicted data. The optimal estimates found using RSM was practically confirmed and was 66.30 MPa FS, 23.66% Por., and 4.307 DE acquired at 47.97% SL, 15 wt% MC, 3 RM, and 9.68 wt% BN, respectively.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
