采用液相烧结法制取具有良好塑性和微观组织的板坯,在650～1100℃之间,在不同轧制工艺参数下进行轧制.通过SEM和OM微观分析手段观察金相和断口组织,研究了W-Ni-Fe板材轧制过程中轧制工艺参数对断裂方式的影响.结果表明:随着变形率的增加,板材的断裂行为由脆性断裂向韧性断裂过渡;晶界处聚集的O,S,C等杂质元素引起脆性断裂;板材的机械性能与W颗粒和粘接相分布有密切关系,并受加工率的影响.
参考文献
| [1] | 王占学.塑性加工金属学[M].北京:冶金工业出版社,1991 |
| [2] | 周吉峰;殷为宏 .钨基高比重合金的研究进展[J].稀有金属材料与工程,1998,10(05):111. |
| [3] | 范景莲;曲选辉;李益民 .纳米钨基高比重合金粉末的SEM结构与分布均匀性分析[J].稀有金属材料与工程,2002,10(02):46. |
| [4] | Yoon E S;Yu J H;Lee J S.Sintering behaviour of the PIMed 93W-Ni-Fe Nanocomposite powder[A].Granada, Spain,1998:57. |
| [5] | Kanninen M F;Popelar C H.Advanced Fracture Mechanics[M].Oxford: Oxford University Press,1985 |
| [6] | Kim D S;Nemat-Nasser S;Isaacs J B et al.Adiabetic shearband in WHA in high strain-ratecompression[J].Mechanics of Materials,1998,28:227. |
| [7] | Krock R H;Shepard L A .Mechanical behavior of the two phase composite,Tungsten-Nickel-Iron[J].Transactions AIME,1963,277:1127. |
| [8] | Nye J F.Physical Properties of Crystals[M].Oxford:Oxford University Press,1957 |
| [9] | Ostolaza Zamora K M;Gil Sevillano J;Fuentes Perez K .Fracture toughness of W heavy metalalloys[J].Materials Science and Engineering,1992,A157:151. |
| [10] | Ramesh K T;Coates R S .Microstructural influences on the dynamic response of tungsten heavyalloys[J].Metallurgical and Materials Transactions,1992,23A:2625. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%