ASTM E2714-13
蠕变疲劳试验的标准试验方法
Standard Test Method for Creep-Fatigue Testing
- 标准号
- ASTM E2714-13
- 发布
- 2013年
- 发布单位
- 美国材料与试验协会
- 替代标准
- ASTM E2714-13(2020)
- 当前最新
- ASTM E2714-13(2020)
- 引用标准
- ASTM E1012 ASTM E111 ASTM E139 ASTM E177 ASTM E1823 ASTM E220 ASTM E230 ASTM E2368 ASTM E4 ASTM E467 ASTM E606 ASTM E647 ASTM E691 ASTM E8/E8M ASTM E83
- 适用范围
4.1 Creep-fatigue testing is typically performed at elevated temperatures and involves the sequential or simultaneous application of the loading conditions necessary to generate cyclic deformation/damage enhanced by creep deformation/damage or vice versa. Unless such tests are performed in vacuum or an inert environment, oxidation can also be responsible for important interaction effects relating to damage accumulation. The purpose of creep-fatigue tests can be to determine material property data for (a) assessment input data for the deformation and damage condition analysis of engineering structures operating at elevated temperatures (b) the verification of constitutive deformation and damage model effectiveness (c) material characterization, or (d) development and verification of rules for new construction and life assessment of high-temperature components subject to cyclic service with low frequencies or with periods of steady operation, or both.
4.2 In every case, it is advisable to have complementary continuous cycling fatigue data (gathered at the same strain/loading rate) and creep data determined from test conducted as per Practice E139 for the same material and test temperature(s). The procedure is primarily concerned with the testing of round bar test specimens subjected (at least remotely) to uniaxial loading in either force or strain control. The focus of the procedure is on tests in which creep and fatigue deformation and damage is generated simultaneously within a given cycle. Data which may be determined from creep-fatigue tests performed under such conditions may characterize (a) cyclic stress-strain deformation response (b) cyclic creep (or relaxation) deformation response (c) cyclic hardening, cyclic softening response or (d) cycles to crack formation, or both.
4.3 While there are a number of testing Standards and Codes of Practice that cover the determination of low cycle fatigue deformation and cycles to crack initiation properties (See Practice E606, BS 7270: 2000, JIS Z 2279–1992, PrEN 3874, 1998, PrEN 3988–1998, ISO 12106–2003, ISO 12111–2005, and Practice E2368-04 and (1, 2, 3)7, some of which provide guidance for testing at high temperature (for example, Practice 蠕变试验机结构与原理
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