1.1 这些试验方法描述了在圆形模具中确定超塑性金属板试样的双轴成形性的程序。 1.2 这些试验方法的目的主要是作为超塑性试验，通过在模腔中形成规定深度而不破裂的能力来测量。这些测试方法也可用于生成用于测量成型零件中气穴的材料。这些可作为规范合格/不合格标准。 1.3 这些测试方法已成功用于铝合金。应验证这些测试方法在其他金属上的使用。 1.4 以国际单位制表示的值应视为标准值。本标准不包括其他测量单位。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 当超塑性材料在工业生产中经常使用时，使用胀形试验来评定一批或一批是否符合验收标准通常很方便。将这些测试方法与测试方法进行比较 第2448页 ，胀形试验不需要机加工试样，执行起来更方便，并且最接近模拟成形零件中存在的多轴应力和应变。这些测试方法不测量材料的固有超塑性性能。试验方法 第2448页 应在该情况下使用。

1.1 These test methods describe procedures for determining the biaxial formability of a test specimen of superplastic metallic sheet in a circular die. 1.2 The intent of these test methods are primarily to be used as tests of superplasticity as measured by the ability to form to a prescribed depth in a die cavity without rupturing. These test methods can also be used to generate material for the measurement of cavitation in the formed part. These can be used as go/no go criteria for qualification to a specification. 1.3 These test methods have been used successfully with aluminum alloys. The use of these test methods on other metals should be verified. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 When a superplastic material is regularly being used in industrial production, it is often convenient to use the bulge test to qualify a batch or heat lot to an acceptance criterion. Comparing these test methods with Test Method E2448 , the bulge test does not require a machined test specimen, it is more convenient to perform, and it most closely simulates the multiaxial stresses and strains present in forming parts. These test methods do not measure the intrinsic superplastic properties of a material. Test Method E2448 should be used in that instance.