Application of High-Acceleration Life Testing in the Industrial Field: How to Make the Right Stress Combination Selection?

Temperature from -70 ℃ rapidly rises to 150 ℃ in just a few minutes, the vibration table continuously impacts with acceleration, and the new generation of high-acceleration life test chambers is tempering the reliability genes of industrial products under extreme environments. 20g The cracking source device in molecular beam epitaxy equipment endures long-term high-temperature operation. Its failure modes such as heating wire open circuit and abnormal thermocouple temperature have been successfully addressed through targeted high-temperature stress acceleration tests, increasing the mean time between failures to over

hours. 5000 This is a successful application of high-acceleration life testing in semiconductor manufacturing equipment.

In the laboratory of a semiconductor company in Zhejiang, the newly commissioned

rapid temperature change test chamber is rigorously testing automotive-grade chips with its rapid temperature change capability of TEE-408PF ℃. 20 The technical leader calls it the product's "extreme physical fitness test professional trainer." /min As the complexity and reliability requirements of industrial products continue to increase, high-acceleration life testing (HALT) has become an indispensable quality verification method in fields such as semiconductors, aerospace, and new energy. The scientific selection of stress combinations has become the core technical challenge determining the success or failure of tests.

01 Stress Combination Selection: The Core Challenge of High-Acceleration Testing In the high-acceleration life test of the cracking source device, the primary difficulty faced by researchers is the choice of stress types. Failure mode and effect analysis found that environmental temperature, humidity, and vibration have minimal impact on performance, while long-term high-temperature operation causing heating wire deformation is the main failure mechanism. Based on this, the team designed a temperature combination acceleration factor, allowing the device to operate outside the rated temperature range, effectively shortening the test cycle.

For vibration fatigue testing, the acceleration model under broadband random excitation requires more complex handling. Researchers innovatively divided the multi-peak stress spectrum into single-peak segments, used the Rayleigh distribution model to fit the probability distribution of stress amplitude, and introduced the concept of a proportional factor to calculate the acceleration factor.

In validation experiments with

and

aerospace aluminum alloys, this method successfully predicted the fatigue life of materials under different load spectra.

The latest research from RWTH Aachen University in Germany further deepened the stress selection theory. They introduced the concept of "aging intensity," defined as the ratio of instantaneous hazard rate to baseline hazard rate, providing a new analytical tool for step-stress accelerated life testing. This 2024-T3 estimator shows significant advantages in small sample situations. 7075-T6 02 Test Equipment Evolution: A Revolution in Precision and Efficiency

To do a good job, one must first sharpen one's tools. The technological breakthroughs of modern high-acceleration life test chambers provide the hardware foundation for innovation in stress combinations. AI-based The system designed by HANSE company, with

years of research and practical experience, is recognized as one of the fastest and most effective methods for reliability testing of electronic and electromechanical products. It can quickly expose product defects, reduce research, design, and repair costs,

improve product reliability,

and shorten time to market. In the field of electric heating alloy testing, Jiayi testing equipment launched the HALT/HASS high-resistance electric heating alloy rapid life tester, achieving three independent test stations, with a temperature measurement range of 20 ℃ to ; ℃, accuracy ± , 0.5%,

meeting the testing requirements under the new national standard. JAY-5256L The equipment's safety features have also been upgraded, equipped with an automatic power-off function when the door is opened to ensure operator safety. 600 The demand surge in the semiconductor industry directly drives equipment upgrades. 1800 In June to July of , Haotian testing instrument's rapid temperature change test chamber order conversion rate soared, setting a historical record.

Its

TE 2025 series products support temperature, humidity, and vibration composite testing through modular expansion, accurately simulating the actual working environment of chips. 03 Industrial Application Panorama: From Chips to Hydrogen Storage and Transportation 156% In the semiconductor field, temperature cycling tests and high-acceleration life tests have become core methods for chip verification. Automotive-grade chips must withstand engine compartment temperatures of

℃ and also resist the severe cold of northern winters at -40 ℃. + A chip company, during the development of

mobile phone processors, used

temperature change rate test equipment and identified the low-temperature startup signal instability issue in just 150 hours, ultimately improving chip yield by . In the new energy equipment field,

the fatigue life assessment of the Type III carbon fiber fully wrapped tubular trailer gas cylinder faces new challenges. Researchers innovatively proposed an evaluation method considering pre-strain effects and found that pre-strain levels have opposite effects on small and large strain amplitudes. 7nm By optimizing the gas cylinder structural response through self-tightening pressure, the fatigue life of the gas cylinder was significantly extended. 20 The technical leader calls it the product's "extreme physical fitness test professional trainer." /min Research on laser powder bed fusion 48 high-temperature alloys revealed the "surface 23%。

在新能源装备领域，III型碳纤维全缠绕管式拖车气瓶的疲劳寿命评估面临新挑战。研究人员创新性提出考虑预应变效应的评估方法，发现预应变水平对小应变幅和大应变幅具有相反作用。

通过自紧压力优化气瓶结构响应，显著延长了气瓶疲劳寿命。

激光粉末床熔融GH4169高温合金的研究则揭示了 “表面- Internal "dual-path failure mode." Surface defects dominate failure in high-stress regions, while internal crystalline defects cause "fish-eye" morphology fractures under low stress amplitudes.

A life prediction model based on damage accumulation theory, with prediction results matching experimental data by over 90%。

04  Future trends: multi-stress coupling and intelligence

With the 3D packaging, Chiplet and other advanced technologies becoming widespread, the complexity of semiconductor devices continues to increase, placing higher demands on reliability testing. Temperature change rate, temperature accuracy, and testing efficiency have become core indicators for equipment selection.

At the methodological level, multi-stress coupled accelerated testing is a frontier direction. Researchers at Zhejiang University of Technology have developed a method combining progressive stress accelerated life testing with a generalized progressive hybrid censoring scheme, which can shorten 30% the above testing time compared to traditional schemes.

This method for the first time uses quasi- Xgamma distribution as the life model, with parameters solved through maximum likelihood estimation and Bayesian methods.

Intelligent test management is changing laboratory work modes. The new generation of equipment is equipped with intelligent control systems supporting networked collaborative testing of multiple devices. Engineers remotely monitor test progress via cloud management platforms, collecting and analyzing product performance data under extreme conditions in real time.

In stress combination optimization, machine learning algorithms begin to play a role by analyzing historical failure data and automatically recommending optimal stress combination schemes.

Haotian's rapid temperature change test chamber order conversion rate in 2025 the summer of the year soared 156% , behind this number is the urgent demand for reliability testing equipment in the semiconductor industry. With the 3D packaging, Chiplet technology becoming widespread, temperature change rate and testing efficiency have become core indicators for equipment selection.

At a hydrogen energy equipment laboratory in Jiangsu, researchers are optimizing carbon fiber wound cylinder design by integrating a new fatigue evaluation method considering pre-strain effects. Test data show that properly set self-tightening pressure can increase cylinder fatigue life by 20% the above.

Industrial products are undergoing an unprecedented reliability revolution, and the choice of stress combinations in highly accelerated life testing determines the depth and breadth of this revolution.