ASTM C1576-05(2017)
通过室温恒压力弯曲试验(应力破裂)测定高级陶瓷慢裂纹生长参数的标准试验方法
Standard Test Method for Determination of Slow Crack Growth Parameters of Advanced Ceramics by Constant Stress Flexural Testing (Stress Rupture) at Ambient Temperature
ASTM C1576-05(2017) 发布历史
ASTM C1576-05(2017)由美国材料与试验协会 US-ASTM 发布于 2005。
ASTM C1576-05(2017) 在中国标准分类中归属于: Q32 特种陶瓷，在国际标准分类中归属于: 81.060.30 高级陶瓷。
ASTM C1576-05(2017) 发布之时，引用了标准
- ASTM C1145 高级陶瓷标准术语
- ASTM C1161 环境温度下高级陶瓷抗弯强度标准试验方法
- ASTM C1322 高级陶瓷断裂原因分形与表征的标准实践
- ASTM C1368 用环境温度下恒定应力速率强度测试法测定高级陶瓷慢速裂纹生长参数的标准试验方法
- ASTM C1465 用高温恒定应力速率弯曲试验测定高级陶瓷缓慢裂纹扩展参数的标准试验方法
- ASTM E112 测定平均粒度的标准试验方法
- ASTM E1823 关于疲劳和断裂测试的标准术语
- ASTM E337 用干湿球湿度计测定湿度的标准试验方法(湿球和干球温度的测量)
- ASTM E399 金属材料平面应变断裂韧性的标准试验方法
- ASTM E4 试验机的负荷校准的标准实施规程
- ASTM E6 机械试验方法的有关标准术语
ASTM C1576-05(2017)的历代版本如下：
- 2005年 ASTM C1576-05(2017) 通过室温恒压力弯曲试验(应力破裂)测定高级陶瓷慢裂纹生长参数的标准试验方法
- 2005年 ASTM C1576-05(2010) 在环境温度下加恒定应力弯曲试验(应力破裂)测定整体高级陶瓷裂纹缓慢增长参数的标准试验方法
- 2005年 ASTM C1576-05 室温下用恒应力弯曲试验(应力破裂)测定高级陶瓷慢速裂纹增长参数的标准试验方法
4.1 The service life of many structural ceramic components is often limited by the subcritical growth of cracks. This test method provides an approach for appraising the relative slow crack growth susceptibility of ceramic materials under specified environments at ambient temperature. Furthermore, this test method may establish the influences of processing variables and composition on slow crack growth as well as on strength behavior of newly developed or existing materials, thus allowing tailoring and optimizing material processing for further modification. In summary, this test method may be used for material development, quality control, characterization, design code or model verification, and limited design data generation purposes.
Note 4: Data generated by this test method do not necessarily correspond to crack velocities that may be encountered in service conditions. The use of data generated by this test method for design purposes, depending on the range and magnitude of applied stresses used, may entail extrapolation and uncertainty.
4.2 This test method is related to Test Method C1368 (“constant stress-rate flexural testing”), however, C1368 uses constant stress rates to determine corresponding flexural strengths whereas this test method employs constant stress to determine corresponding times to failure. In general, the data generated by this test method may be more representative of actual service conditions as compared with those by constant stress-rate testing. However, in terms of test time, constant stress testing is inherently and significantly more time consuming than constant stress rate testing.
4.3 The flexural stress computation in this test method is based on simple elastic beam theory, with the assumptions that the material is isotropic and homogeneous, the moduli of elasticity in tension and compression are identical, and the material is linearly elastic. The grain size should be no greater than one-fiftieth (1/50 ) of the beam depth as measured by the mean linear intercept method (Test Methods E112). In cases where the material grain size is bimodal or the grain size distribution is wide, the limit should apply to the larger grains.
4.4 The test specimen sizes and test fixtures have been selected in accordance with Test Methods C1161 and C1368, which provides a balance between practical configurations and resulting errors, as discussed in Ref (4, 5).
4.5 The data are evaluated by regression of log applied stress versus log time to failure to the experimental data. The recommendation is to determine the slow crack growth parameters by applying the power law crack velocity function. For derivation of this, and for alternative crack velocity functions, see Appendix X1.
Note 5:
- 标准号
- ASTM C1576-05(2017)
- 发布
- 2005年
- 发布单位
- 美国材料与试验协会
- 当前最新
- ASTM C1576-05(2017)
- 引用标准
- ASTM C1145 ASTM C1161 ASTM C1322 ASTM C1368 ASTM C1465 ASTM E112 ASTM E1823 ASTM E337 ASTM E399 ASTM E4 ASTM E6