课程名称︰材料科学概论 课程性质︰系选修 课程教师︰吕宗昕 开课学院：工学院 开课系所︰化工系 考试日期（年月日）︰100/11/29 考试时限（分钟）：120 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1. (a)Describe the general criteria when solid-solutions are formed.(4%) (b)Describe the meaning of resilience and true strain.(4%) (c)Describe the meaning of anisotropy and isotropy.(4%) (d)Calculate the poisson's ration v when the materials do not have net change of volume during loading.(6%) 2. (a)Describe the Miller indoces for planes A and B.(6%) (b)Calculate the intersection of planes A and B.(6%) (c)Write the names of crystal systems which the three axes are not equal with each other.(6%) (plane A:过三点:(0.5,0,0) (0,0,2/3) (0,1,2/3) plane B:(1,0,0) (0,1,0) (1,1,1/3)) p.s.原题目是图 3. Please prove tge bragg's law.(8%) 4. The XRD pattern of Cu (FCC structure) is shown as below. The wavelength of XRD is 0.154nm. (a)Index peaks A and B.(6%) (b)Determine the imterplanar spacing for peaks A and B.(6%) (c)Use peak B to calculate the atomic radius for Cu.(6%) (有一个图谱) 5. (a)Use the Fig.1 to predict the difference between X and Y, and explain the reason.(6%) (图示:力与半径图，两个曲线，微分值Y>X曲线) (b)Describe the physical meaning of points A,M,F in Fig. 2. (6%) A:降伏点 M:stress最大值 F:末端 6. The diffusion coefficient for silver in Ni at 650 degree C and 900 degree C are 6.3 E(-16) and 1.2 E(-13) m^2/s, respectively. Please calculate (a)the activation energy (b)the diffusion coefficient at 800 degree C.(10% total 7. A cylindrical sample of a metal alloy is stressed in compression. If its original and fonal diameter is 17.00 and 17.05 mm, respectively, and its final length is 80mm. The elastic and shear muduli for this alloy are 58 and 26GPa. (a)Compute the original length if this alloy.(4%) (b)Compute the true strain during the compression process.(4%) (c)Compute the engineering stress during the compression process(4%) Exam ends here. -- 夜饮东坡醒复醉，归来彷佛三更。家僮鼻息已雷鸣，敲门都不应，倚杖听江声。 长恨此身非我有，何时忘却营营？夜阑风静縠纹平，小舟从此逝，江海寄余生。 --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 1.162.40.82